Re: Stus-List Folding Prop won't open - prop size.

[Gary Russell via CnC-List]

Yup.  That's what I do.
Gary

~~~_/)~~


On Fri, Oct 28, 2016 at 10:44 AM, Nate Flesness via CnC-List <
cnc-list@cnc-list.com> wrote:

> My surveyor pointed out that if you place a shaft zinc FORWARD of the
> cutlass bearing, coupler failure will NOT result in a big hole in your
> boat. I see them AFT all the time walking boatyards after haulout..
>
> Nate
>
> On Thu, Oct 27, 2016 at 6:40 PM, Gary Russell via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> You are lucky the shaft didn't exit the boat!
>> Gary
>> S/V Kaylarah
>>
>> ~~~_/)~~
>>
>>
>> On Thu, Oct 27, 2016 at 7:37 PM, Daniel Sheer via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> I have a 2 blade MaxProp which feathers rather than folds, but I also
>>> had a vibration problem. My mechanic suggested that the length of shaft
>>> from the strut to the prop was to long. He extended the key slot at the
>>> front of the shaft by about 2" and drilled new dimples for the set screws.
>>> It got rid of much of the vibration. Not all, but quite a lot.
>>> Unfortunately the coupling at the tranny was worn, and eventually the shaft
>>> slipped out prior to the start of a race. Was able to re-insert the shaft
>>> in the coupling with much grunting and groaning, but missed the race. Had
>>> to replace the coupling. Since then all's been good enough.
>>>
>>> Dan Sheer
>>> Pegathy - LF38
>>> Rock Creek off the Patapsco
>>>
>>> ___
>>>
>>> This list is supported by the generous donations of our members. If you
>>> wish to make a contribution to offset our costs, please go to:
>>> https://www.paypal.me/stumurray
>>>
>>> All Contributions are greatly appreciated!
>>>
>>>
>>
>> ___
>>
>> This list is supported by the generous donations of our members. If you
>> wish to make a contribution to offset our costs, please go to:
>> https://www.paypal.me/stumurray
>>
>> All Contributions are greatly appreciated!
>>
>>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
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Re: Stus-List Folding Prop won't open - prop size.

[Nate Flesness via CnC-List]

My surveyor pointed out that if you place a shaft zinc FORWARD of the
cutlass bearing, coupler failure will NOT result in a big hole in your
boat. I see them AFT all the time walking boatyards after haulout..

Nate

On Thu, Oct 27, 2016 at 6:40 PM, Gary Russell via CnC-List <
cnc-list@cnc-list.com> wrote:

> You are lucky the shaft didn't exit the boat!
> Gary
> S/V Kaylarah
>
> ~~~_/)~~
>
>
> On Thu, Oct 27, 2016 at 7:37 PM, Daniel Sheer via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> I have a 2 blade MaxProp which feathers rather than folds, but I also had
>> a vibration problem. My mechanic suggested that the length of shaft from
>> the strut to the prop was to long. He extended the key slot at the front of
>> the shaft by about 2" and drilled new dimples for the set screws. It got
>> rid of much of the vibration. Not all, but quite a lot. Unfortunately the
>> coupling at the tranny was worn, and eventually the shaft slipped out prior
>> to the start of a race. Was able to re-insert the shaft in the coupling
>> with much grunting and groaning, but missed the race. Had to replace the
>> coupling. Since then all's been good enough.
>>
>> Dan Sheer
>> Pegathy - LF38
>> Rock Creek off the Patapsco
>>
>> ___
>>
>> This list is supported by the generous donations of our members. If you
>> wish to make a contribution to offset our costs, please go to:
>> https://www.paypal.me/stumurray
>>
>> All Contributions are greatly appreciated!
>>
>>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
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make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open - prop size.

[Gary Russell via CnC-List]

You are lucky the shaft didn't exit the boat!
Gary
S/V Kaylarah

~~~_/)~~


On Thu, Oct 27, 2016 at 7:37 PM, Daniel Sheer via CnC-List <
cnc-list@cnc-list.com> wrote:

> I have a 2 blade MaxProp which feathers rather than folds, but I also had
> a vibration problem. My mechanic suggested that the length of shaft from
> the strut to the prop was to long. He extended the key slot at the front of
> the shaft by about 2" and drilled new dimples for the set screws. It got
> rid of much of the vibration. Not all, but quite a lot. Unfortunately the
> coupling at the tranny was worn, and eventually the shaft slipped out prior
> to the start of a race. Was able to re-insert the shaft in the coupling
> with much grunting and groaning, but missed the race. Had to replace the
> coupling. Since then all's been good enough.
>
> Dan Sheer
> Pegathy - LF38
> Rock Creek off the Patapsco
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
___

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make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List Folding Prop won't open - prop size.

[Daniel Sheer via CnC-List]

I have a 2 blade MaxProp which feathers rather than folds, but I also had a 
vibration problem. My mechanic suggested that the length of shaft from the 
strut to the prop was to long. He extended the key slot at the front of the 
shaft by about 2" and drilled new dimples for the set screws. It got rid of 
much of the vibration. Not all, but quite a lot. Unfortunately the coupling at 
the tranny was worn, and eventually the shaft slipped out prior to the start of 
a race. Was able to re-insert the shaft in the coupling with much grunting and 
groaning, but missed the race. Had to replace the coupling. Since then all's 
been good enough. 

Dan SheerPegathy - LF38Rock Creek off the Patapsco
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Re: Stus-List Folding Prop won't open

[Hoyt, Mike via CnC-List]

Gary

Our Frers 33 currently has Martec RH 16DX14P-3  The 16 inches does not seem to 
large and it is certainly a smaller boat than the C 35-3.  Note that we also 
have the 3GM30F engine with Kanzaki transmission.  Flex-o-Fold has sold me a 16 
x 12 prop (on its way from Denmark as I type this).

Should Dave be checking Cutlass bearing, the keys where coupler is attached to 
shaft, etc?  Sounds like something is normally in alignment then once out gets 
reseated by pulling back on the shaft (reverse) and then pushing shaft forward.

Mike
Persistence
Halifax

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Gary Russell 
via CnC-List
Sent: Thursday, October 27, 2016 8:55 AM
To: C List
Cc: Gary Russell
Subject: Re: Stus-List Folding Prop won't open

HI Dave,
 If you can only get 2600 RPM something is wrong.  You either have the 
wrong pitch or there is something wrong with the engine (throttle cable, etc.). 
 If there is black smoke at 2600 RPM it is most likely the pitch.  If the pitch 
is too great, I'm wondering if the prop is cavitating which can cause 
vibration.  Also, a 16" diameter sounds large for a 35 MK III.  If the blades 
swing too close to the hull, that can cause vibration.  I seem to recall that 
if the blade swings closer than 15% (I think) of the diameter from the hull 
that will cause vibration.  I had a 35 MK II and a 14" prop was marginal.

Gary
S/V Kaylarah
'90 C 37+
East Greenwich, RI, USA

~~~_/)~~

On Wed, Oct 26, 2016 at 9:21 PM, Dave via CnC-List 
<cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote:
Kevin,

I've struggled with the same issue for three seasons.

When I first got the boat it have a Martek 2 blade folding prop. When motoring 
off the mooring no problem. But after sailing the prop vibrated horribly. 
Throwing it into reverse and then back into forward usually but not always 
resolved the issue. At the end of the season I sent the prop to Martek to have 
it rebuilt. I also had the transmission rebuilt and the cone gear replaced. Put 
the boat back in the water in the spring and found that the problem was still 
there. The following winter I replaced the Martek prop with a Flexofold. Lwo 
and behold the problem is still there.

I made sure that the engine was in alignment and had two boat yard mechanics 
out on the boat. When heading into a 3 knot current there was no vibration but 
when we went perpendicular to the current the vibration resumed. This happened 
repeatedly. The mechanics told be that the vibration is typical for a two 
bladed folding prop. One thing that became apparrent during that test was that 
the maximum rotation I was able to get up to was 2600 RPM. The boat has the 
original Yanmar 3GM30 and Kanzaki KM3-A transmission. The gear ratio is not 
stamped on the transmission but, I've been assured that the gear ratio is 
2.61:1 and have no reason to believe it's not. I purchased the prop recommended 
to me by Flexofold which is 2 blade 16x12R. When I told Flexofold about the 
issue they insisted that the prop was the correct one and I do know that other 
35 MK3s have had success with this same set up.

The Flexofold blades are geared to one another. So, it's impossible for one 
blade to open while the other is not. So, that can not be the problem.

So, any ideas beyond what I've already done are greatly appreciated.

Dave J
Saltaire
C 35MK3
Bristol, RI



From: "John and Maryann Read via CnC-List" 
<cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>>
To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>
Cc: "John and Maryann Read" 
<johnpr...@comcast.net<mailto:johnpr...@comcast.net>>
Sent: Wednesday, October 26, 2016 7:18:44 AM
Subject: Re: Stus-List Folding Prop won't open


Ditto to Dave’s comment.  Our Yanmar 3GM is mounted to a Kanzaki transmission 
that was slipping.  Symptoms were prop did not open symmetrically because was 
not spinning enough so lots of vibration, when it did fully open the shaft was 
not spinning at a rate consistent with the throttle.  No obvious issues with 
the prop manually opening when hauled.  Pulled transmission, got it rebuilt.  
Biggest expense was OEM rebuild kit and needed new cone gear as was polished.  
Reinstalled and problem solved.  When reinstalling it is very important to 
ensure the shift cable is adjusted so the transmission lever is fully engaged 
before the lever on the binnacle is at the end of its travel – ie there is some 
remaining movement for the spring fitting that attaches the cable to the 
transmission lever.  In our case that meant attaching to the inner transmission 
lever hole.  Also, an annual maintenance item is to oil the spring fitting.

FWIW, here is the info on my rebuilder.  He is the person who did all the 
transmission work for Mack Boring when they were in the business of rebuilding 
and apparently there are some tricks of the trade to c

Re: Stus-List Folding Prop won't open

[Nauset Beach via CnC-List]

Dave,

 

When I spoke with Flex o Fold in April one potential source of vibration that 
was suggested [in addition to the others already mentioned in this thread] was 
how the prop hub was set on the shaft.  The fellow said some times the key 
slips forward slightly as the hub is put on the shaft and the hub then rides up 
on it, making the hub / shaft combination slightly out of balance.  I had 
originally dry fit the hub without the key and marked where it fit on the 
shaft, then put the hub on with the key.  Had thought it was correct.  

 

I did get new blades [ 12 pitch vs the 13 pitch I was originally sold] and 
re-set the original hub on the shaft making certain the hub was properly seated 
on the shaft.  The vibration was greatly reduced.  

 

Might be worth double checking the hub.  

 

Good luck,

Brian

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dave via 
CnC-List
Sent: Wednesday, October 26, 2016 9:21 PM
To: cnc-list@cnc-list.com
Cc: davidjaco...@comcast.net
Subject: Re: Stus-List Folding Prop won't open

 

Kevin,

 

I've struggled with the same issue for three seasons.

 

When I first got the boat it have a Martek 2 blade folding prop. When motoring 
off the mooring no problem. But after sailing the prop vibrated horribly. 
Throwing it into reverse and then back into forward usually but not always 
resolved the issue. At the end of the season I sent the prop to Martek to have 
it rebuilt. I also had the transmission rebuilt and the cone gear replaced. Put 
the boat back in the water in the spring and found that the problem was still 
there. The following winter I replaced the Martek prop with a Flexofold. Lwo 
and behold the problem is still there. 

 

I made sure that the engine was in alignment and had two boat yard mechanics 
out on the boat. When heading into a 3 knot current there was no vibration but 
when we went perpendicular to the current the vibration resumed. This happened 
repeatedly. The mechanics told be that the vibration is typical for a two 
bladed folding prop. One thing that became apparrent during that test was that 
the maximum rotation I was able to get up to was 2600 RPM. The boat has the 
original Yanmar 3GM30 and Kanzaki KM3-A transmission. The gear ratio is not 
stamped on the transmission but, I've been assured that the gear ratio is 
2.61:1 and have no reason to believe it's not. I purchased the prop recommended 
to me by Flexofold which is 2 blade 16x12R. When I told Flexofold about the 
issue they insisted that the prop was the correct one and I do know that other 
35 MK3s have had success with this same set up.

 

The Flexofold blades are geared to one another. So, it's impossible for one 
blade to open while the other is not. So, that can not be the problem. 

 

So, any ideas beyond what I've already done are greatly appreciated.

 

Dave J

Saltaire

C 35MK3

Bristol, RI

 

___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open

[Gary Russell via CnC-List]

HI Dave,
 If you can only get 2600 RPM something is wrong.  You either have the
wrong pitch or there is something wrong with the engine (throttle cable,
etc.).  If there is black smoke at 2600 RPM it is most likely the pitch.
If the pitch is too great, I'm wondering if the prop is cavitating which
can cause vibration.  Also, a 16" diameter sounds large for a 35 MK III.
If the blades swing too close to the hull, that can cause vibration.  I
seem to recall that if the blade swings closer than 15% (I think) of the
diameter from the hull that will cause vibration.  I had a 35 MK II and a
14" prop was marginal.

Gary
S/V Kaylarah
'90 C 37+
East Greenwich, RI, USA

~~~_/)~~


On Wed, Oct 26, 2016 at 9:21 PM, Dave via CnC-List <cnc-list@cnc-list.com>
wrote:

> Kevin,
>
> I've struggled with the same issue for three seasons.
>
> When I first got the boat it have a Martek 2 blade folding prop. When
> motoring off the mooring no problem. But after sailing the prop vibrated
> horribly. Throwing it into reverse and then back into forward usually but
> not always resolved the issue. At the end of the season I sent the prop to
> Martek to have it rebuilt. I also had the transmission rebuilt and the cone
> gear replaced. Put the boat back in the water in the spring and found that
> the problem was still there. The following winter I replaced the Martek
> prop with a Flexofold. Lwo and behold the problem is still there.
>
> I made sure that the engine was in alignment and had two boat yard
> mechanics out on the boat. When heading into a 3 knot current there was no
> vibration but when we went perpendicular to the current the vibration
> resumed. This happened repeatedly. The mechanics told be that the vibration
> is typical for a two bladed folding prop. One thing that became apparrent
> during that test was that the maximum rotation I was able to get up to was
> 2600 RPM. The boat has the original Yanmar 3GM30 and Kanzaki KM3-A
> transmission. The gear ratio is not stamped on the transmission but, I've
> been assured that the gear ratio is 2.61:1 and have no reason to believe
> it's not. I purchased the prop recommended to me by Flexofold which is 2
> blade 16x12R. When I told Flexofold about the issue they insisted that
> the prop was the correct one and I do know that other 35 MK3s have had
> success with this same set up.
>
> The Flexofold blades are geared to one another. So, it's impossible for
> one blade to open while the other is not. So, that can not be the problem.
>
> So, any ideas beyond what I've already done are greatly appreciated.
>
> Dave J
> Saltaire
> C 35MK3
> Bristol, RI
>
>
> --
> *From: *"John and Maryann Read via CnC-List" <cnc-list@cnc-list.com>
> *To: *cnc-list@cnc-list.com
> *Cc: *"John and Maryann Read" <johnpr...@comcast.net>
> *Sent: *Wednesday, October 26, 2016 7:18:44 AM
> *Subject: *Re: Stus-List Folding Prop won't open
>
>
> Ditto to Dave’s comment.  Our Yanmar 3GM is mounted to a Kanzaki
> transmission that was slipping.  Symptoms were prop did not open
> symmetrically because was not spinning enough so lots of vibration, when it
> did fully open the shaft was not spinning at a rate consistent with the
> throttle.  No obvious issues with the prop manually opening when hauled.
> Pulled transmission, got it rebuilt.  Biggest expense was OEM rebuild kit
> and needed new cone gear as was polished.  Reinstalled and problem solved.
> When reinstalling it is very important to ensure the shift cable is
> adjusted so the transmission lever is fully engaged before the lever on the
> binnacle is at the end of its travel – ie there is some remaining movement
> for the spring fitting that attaches the cable to the transmission lever.
> In our case that meant attaching to the inner transmission lever hole.
> Also, an annual maintenance item is to oil the spring fitting.
>
>
>
> FWIW, here is the info on my rebuilder.  He is the person who did all the
> transmission work for Mack Boring when they were in the business of
> rebuilding and apparently there are some tricks of the trade to correctly
> rebuild.  Shipping was by parcel post, he was very informative and easy to
> work with.  I had the unit returned to me in 7 days.  No affiliation just a
> happy customer.
>
>
>
> Rick Neary
>
> East Coast Marine Transmission
>
> 253 Vineyard Ave
>
> South Amboy, NJ  08879
>
> 732-991-0694
>
>
>
> John and Maryann
>
> Legacy III
>
> 1982 C 34
>
> Noank, CT
>
>
>
> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Dave
> S via CnC-List
> *Sent:* Tuesday, October 25, 2016 11:02 AM
> *To:* C Stus List
> *Cc:* Da

Re: Stus-List Folding Prop won't open

[Dave via CnC-List]

Dave, 
If your shift linkage is correctly adjusted and you have dealt with the 
alignment, shaft and prop, and the vibration can be described as violent as the 
Revs  increase, I would not rule out the transmission, despite  the rebuild.
You mention a new cone gear, (?) but that does not confirm that the mating 
surfaces of the bronze cone (male) and its stainless (female) mate in the 
forward gear have been renewed or deglazed (lapped) when the unit was serviced. 
 That's where the slipping occurs.  Might not hurt to check this with the shop. 
   It's a really weird problem, and seems like something badly out of balance 
more than slipping.  Mine really shook the boat.  The symptoms you describe in 
your first paragraph were EXACTLY what I experienced.
Good luck!
Dave

Message: 1
Date: Thu, 27 Oct 2016 01:21:07 + (UTC)
From: davidjaco...@comcast.net
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Folding Prop won't open
Message-ID:
   <1690653408.11591953.1477531267762.javamail.zim...@comcast.net>
Content-Type: text/plain; charset="utf-8"

Kevin, 

I've struggled with the same issue for three seasons. 

When I first got the boat it have a Martek 2 blade folding prop. When motoring 
off the mooring no problem. But after sailing the prop vibrated horribly. 
Throwing it into reverse and then back into forward usually but not always 
resolved the issue. At the end of the season I sent the prop to Martek to have 
it rebuilt. I also had the transmission rebuilt and the cone gear replaced. Put 
the boat back in the water in the spring and found that the problem was still 
there. The following winter I replaced the Martek prop with a Flexofold. Lwo 
and behold the problem is still there. 

I made sure that the engine was in alignment and had two boat yard mechanics 
out on the boat. When heading into a 3 knot current there was no vibration but 
when we went perpendicular to the current the vibration resumed. This happened 
repeatedly. The mechanics told be that the vibration is typical for a two 
bladed folding prop. One thing that became apparrent during that test was that 
the maximum rotation I was able to get up to was 2600 RPM. The boat has the 
original Yanmar 3GM30 and Kanzaki KM3-A transmission. The gear ratio is not 
stamped on the transmission but, I've been assured that the gear ratio is 
2.61:1 and have no reason to believe it's not. I purchased the prop recommended 
to me by Flexofold which is 2 blade 16x12R. When I told Flexofold about the 
issue they insisted that the prop was the correct one and I do know that other 
35 MK3s have had success with this same set up. 

The Flexofold blades are geared to one another. So, it's impossible for one 
blade to open while the other is not. So, that can not be the problem. 

So, any ideas beyond what I've already done are greatly appreciated. 

Dave J 
Saltaire 
C 35MK3 
Bristol, RI 

Sent from my iPad___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open

[Dennis C. via CnC-List]

Yes!  That was me!  I really like the crew going overboard at the end.
That kind of boat loyalty is hard to cultivate.  :)

Those guys were good!

Dennis C.

On Wed, Oct 26, 2016 at 7:45 PM, Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> Dennis,
>
> I took a video of you backing in.  Very professional!  You can see what I
> saw at the following link.
>
> https://youtu.be/rOCk8V0uee8
>
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
>
> On Oct 26, 2016 4:46 PM, "Dennis C. via CnC-List" 
> wrote:
>
>> Touche's slip is to port when approaching.  I approach slowly about a
>> half boat length off the piling line.  I've already looked at the windexes
>> of the stationary boats to determine the wind.  I've looked at the water on
>> the pilings for any current.
>>
>> When Touche's shrouds are about center of the slip next to me, I shift to
>> reverse and turn the bow away from the slip.  With the rudder still hard to
>> starboard, the boat still has a bit of forward way.  As the boat begins to
>> gather sternway, I ease the rudder and the throttle.  Prop walk is pulling
>> the boat past the starboard bow piling and into the slip.  Once clear of
>> the starboard bow piling, I use the rudder and throttle to back fully into
>> the slip.  Once in, a bit of forward thrust stops the boat.  Easy.
>>
>> However, the caveat to "easy" is I've been doing it for 17 years.  The
>> first few tries were ugly.  It does take a lot of practice to achieve a
>> smooth stern in docking.  For those who master it, it's a source of pride.
>> I think I'm the only guy on my pier that can do it smoothly.
>>
>> And...on occasion, I do completely bungle a docking.  BTW, Touche' has a
>> Martec 2 blade folder.
>>
>> My neighbor does things a bit differently.  He motors well past his slip
>> then backs up and swings into his slip using the rudder.  More of a brute
>> force approach rather than finesse.
>>
>> On a few occasions I've had the opportunity to watch the weigh ins at a
>> couple of fishing tournaments.  The skill of the charter captains is
>> phenomenal.  They come into a harbor, motor to the center of a fairway, use
>> the two engines to spin the boat's stern into the fairway, back directly
>> down the fairway in what seems an impossibly straight line, stop within a
>> gnat's whisker of the bulkhead, then gently place the boat's stern against
>> the bulkhead and keep it there with a bit of reverse.  The crew offloads
>> the catches for weighing, the crowd roars with each weight announcement.
>> Then, as quickly as it came, the boat is gone.  Amazing seamanship.
>>
>> Dennis C.
>> Touche' 35-1 #83
>> mandeville, LA
>>
>> On Wed, Oct 26, 2016 at 3:16 PM, Chuck S via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> FWIW, I heard it explained that propwalk originates because the shaft is
>>> at an angle to horizontal. The more angle the more prop walk. Also, more
>>> surface area of the prop causes more prop walk. Sail drives have the least
>>> prop walk because their shaft is horizontal, not at an angle. Power boats
>>> with outboards have very little propwalk. Powerboats with inboards and
>>> angled shafts have the most prop walk as their props are huge, too.
>>>
>>> Propwalk is not a problem but a sideways thrust that if used wisely, can
>>> be very helpful at times.
>>>
>>> When docking stern first, I get the boat moving where I want it and
>>> shift into neutral. I leave the throttle at idle and shift into reverse
>>> just long enough to keep her moving. To slow or to stop, I place the
>>> shifter into foreward only long enough to stop. Impulse power vs warp
>>> power.
>>>
>>> Chuck Scheaffer
>>> Resolute 1990 C 34R
>>>
>>> On October 26, 2016 at 1:20 AM Jeremy Ralph via CnC-List <
>>> cnc-list@cnc-list.com> wrote:
>>>
>>> I had issues with my 2 blade Martec though not as bad as you describe.
>>> I would open with a clunk, sometimes stick when opening, and have some bad
>>> vibrations. A surveyor informed me it should be be rebuilt, which is in the
>>> works.  I replaced it with a 3 blade Campbell Sailer prop, which I'm
>>> happy with, although reversing with the Martec had way less prop walk.
>>>
>>>
 Hey guys, with all of the discussion on props it reminded me that I'm
 having an issue with my 2 blade folding prop. Pretty sure it's the
 Martec
 that you all are mentioning.
 I continue to have issues with one blade not opening after we've been
 out
 sailing. Once we drop the sails and go to engage the engine and prop it
 fails to open one side and I get severe vibrations. Is this a normal
 thing
 with these props? It truly makes me want to just get a fixed prop.
 Unfortunately that's not in the budget right now though.
 So far I've tried:
- to come to a complete stop and try again
- Kick it into reverse and then back to forward
- short kick to full throttle.

 The last time we were out nothing worked. We 

Re: Stus-List Folding Prop won't open

[Dave via CnC-List]

Kevin, 

I've struggled with the same issue for three seasons. 

When I first got the boat it have a Martek 2 blade folding prop. When motoring 
off the mooring no problem. But after sailing the prop vibrated horribly. 
Throwing it into reverse and then back into forward usually but not always 
resolved the issue. At the end of the season I sent the prop to Martek to have 
it rebuilt. I also had the transmission rebuilt and the cone gear replaced. Put 
the boat back in the water in the spring and found that the problem was still 
there. The following winter I replaced the Martek prop with a Flexofold. Lwo 
and behold the problem is still there. 

I made sure that the engine was in alignment and had two boat yard mechanics 
out on the boat. When heading into a 3 knot current there was no vibration but 
when we went perpendicular to the current the vibration resumed. This happened 
repeatedly. The mechanics told be that the vibration is typical for a two 
bladed folding prop. One thing that became apparrent during that test was that 
the maximum rotation I was able to get up to was 2600 RPM. The boat has the 
original Yanmar 3GM30 and Kanzaki KM3-A transmission. The gear ratio is not 
stamped on the transmission but, I've been assured that the gear ratio is 
2.61:1 and have no reason to believe it's not. I purchased the prop recommended 
to me by Flexofold which is 2 blade 16x12R. When I told Flexofold about the 
issue they insisted that the prop was the correct one and I do know that other 
35 MK3s have had success with this same set up. 

The Flexofold blades are geared to one another. So, it's impossible for one 
blade to open while the other is not. So, that can not be the problem. 

So, any ideas beyond what I've already done are greatly appreciated. 

Dave J 
Saltaire 
C 35MK3 
Bristol, RI 


- Original Message -

From: "John and Maryann Read via CnC-List" <cnc-list@cnc-list.com> 
To: cnc-list@cnc-list.com 
Cc: "John and Maryann Read" <johnpr...@comcast.net> 
Sent: Wednesday, October 26, 2016 7:18:44 AM 
Subject: Re: Stus-List Folding Prop won't open 



Ditto to Dave’s comment. Our Yanmar 3GM is mounted to a Kanzaki transmission 
that was slipping. Symptoms were prop did not open symmetrically because was 
not spinning enough so lots of vibration, when it did fully open the shaft was 
not spinning at a rate consistent with the throttle. No obvious issues with the 
prop manually opening when hauled. Pulled transmission, got it rebuilt. Biggest 
expense was OEM rebuild kit and needed new cone gear as was polished. 
Reinstalled and problem solved. When reinstalling it is very important to 
ensure the shift cable is adjusted so the transmission lever is fully engaged 
before the lever on the binnacle is at the end of its travel – ie there is some 
remaining movement for the spring fitting that attaches the cable to the 
transmission lever. In our case that meant attaching to the inner transmission 
lever hole. Also, an annual maintenance item is to oil the spring fitting. 



FWIW, here is the info on my rebuilder. He is the person who did all the 
transmission work for Mack Boring when they were in the business of rebuilding 
and apparently there are some tricks of the trade to correctly rebuild. 
Shipping was by parcel post, he was very informative and easy to work with. I 
had the unit returned to me in 7 days. No affiliation just a happy customer. 



Rick Neary 

East Coast Marine Transmission 

253 Vineyard Ave 

South Amboy, NJ 08879 

732-991-0694 



John and Maryann 

Legacy III 

1982 C 34 

Noank, CT 




From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dave S via 
CnC-List 
Sent: Tuesday, October 25, 2016 11:02 AM 
To: C Stus List 
Cc: Dave S 
Subject: Stus-List Folding Prop won't open 





Make sure it's the prop. I threw a ton of money at similar symptoms before 
learning that the transmission was slipping. (bang bang bang in forward only, 
and intermittently, though progressively less so.) 


Pulled the gearbox and did the repair myself in an evening for less than $100 
after replacing a lot of stuff. 





Dave. 











Message: 1 
Date: Tue, 25 Oct 2016 11:43:15 + 
From: Kevin Paxton < kpax...@paxdesigns.com > 
To: cnc-list@cnc-list.com 
Subject: Stus-List Folding Prop won't open 
Message-ID: 
< caokrqryaxxaxcfer76uuybknzaogfkfydz-tktommg+pcys...@mail.gmail.com > 
Content-Type: text/plain; charset="utf-8" 

Hey guys, with all of the discussion on props it reminded me that I'm 
having an issue with my 2 blade folding prop. Pretty sure it's the Martec 
that you all are mentioning. 

I continue to have issues with one blade not opening after we've been out 
sailing. Once we drop the sails and go to engage the engine and prop it 
fails to open one side and I get severe vibrations. Is this a normal thing 
with these props? It truly makes me want to just get a fixed prop. 
Unfortunately that's n

Re: Stus-List Folding Prop won't open

[Josh Muckley via CnC-List]

Dennis,

I took a video of you backing in.  Very professional!  You can see what I
saw at the following link.

https://youtu.be/rOCk8V0uee8

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Oct 26, 2016 4:46 PM, "Dennis C. via CnC-List" 
wrote:

> Touche's slip is to port when approaching.  I approach slowly about a half
> boat length off the piling line.  I've already looked at the windexes of
> the stationary boats to determine the wind.  I've looked at the water on
> the pilings for any current.
>
> When Touche's shrouds are about center of the slip next to me, I shift to
> reverse and turn the bow away from the slip.  With the rudder still hard to
> starboard, the boat still has a bit of forward way.  As the boat begins to
> gather sternway, I ease the rudder and the throttle.  Prop walk is pulling
> the boat past the starboard bow piling and into the slip.  Once clear of
> the starboard bow piling, I use the rudder and throttle to back fully into
> the slip.  Once in, a bit of forward thrust stops the boat.  Easy.
>
> However, the caveat to "easy" is I've been doing it for 17 years.  The
> first few tries were ugly.  It does take a lot of practice to achieve a
> smooth stern in docking.  For those who master it, it's a source of pride.
> I think I'm the only guy on my pier that can do it smoothly.
>
> And...on occasion, I do completely bungle a docking.  BTW, Touche' has a
> Martec 2 blade folder.
>
> My neighbor does things a bit differently.  He motors well past his slip
> then backs up and swings into his slip using the rudder.  More of a brute
> force approach rather than finesse.
>
> On a few occasions I've had the opportunity to watch the weigh ins at a
> couple of fishing tournaments.  The skill of the charter captains is
> phenomenal.  They come into a harbor, motor to the center of a fairway, use
> the two engines to spin the boat's stern into the fairway, back directly
> down the fairway in what seems an impossibly straight line, stop within a
> gnat's whisker of the bulkhead, then gently place the boat's stern against
> the bulkhead and keep it there with a bit of reverse.  The crew offloads
> the catches for weighing, the crowd roars with each weight announcement.
> Then, as quickly as it came, the boat is gone.  Amazing seamanship.
>
> Dennis C.
> Touche' 35-1 #83
> mandeville, LA
>
> On Wed, Oct 26, 2016 at 3:16 PM, Chuck S via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> FWIW, I heard it explained that propwalk originates because the shaft is
>> at an angle to horizontal. The more angle the more prop walk. Also, more
>> surface area of the prop causes more prop walk. Sail drives have the least
>> prop walk because their shaft is horizontal, not at an angle. Power boats
>> with outboards have very little propwalk. Powerboats with inboards and
>> angled shafts have the most prop walk as their props are huge, too.
>>
>> Propwalk is not a problem but a sideways thrust that if used wisely, can
>> be very helpful at times.
>>
>> When docking stern first, I get the boat moving where I want it and shift
>> into neutral. I leave the throttle at idle and shift into reverse just long
>> enough to keep her moving. To slow or to stop, I place the shifter into
>> foreward only long enough to stop. Impulse power vs warp power.
>>
>> Chuck Scheaffer
>> Resolute 1990 C 34R
>>
>> On October 26, 2016 at 1:20 AM Jeremy Ralph via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>> I had issues with my 2 blade Martec though not as bad as you describe.  I
>> would open with a clunk, sometimes stick when opening, and have some bad
>> vibrations. A surveyor informed me it should be be rebuilt, which is in the
>> works.  I replaced it with a 3 blade Campbell Sailer prop, which I'm
>> happy with, although reversing with the Martec had way less prop walk.
>>
>>
>>> Hey guys, with all of the discussion on props it reminded me that I'm
>>> having an issue with my 2 blade folding prop. Pretty sure it's the Martec
>>> that you all are mentioning.
>>> I continue to have issues with one blade not opening after we've been out
>>> sailing. Once we drop the sails and go to engage the engine and prop it
>>> fails to open one side and I get severe vibrations. Is this a normal
>>> thing
>>> with these props? It truly makes me want to just get a fixed prop.
>>> Unfortunately that's not in the budget right now though.
>>> So far I've tried:
>>>- to come to a complete stop and try again
>>>- Kick it into reverse and then back to forward
>>>- short kick to full throttle.
>>>
>>> The last time we were out nothing worked. We ended up limping along back
>>> to
>>> our slip. Afterwards I checked it by rotating it from the inside and it
>>> sounded like both blades would open when it was facing down because I
>>> heard
>>> the clunk.
>>> Occasionally it will open but it's not a first time thing. On departure
>>> from the slip I don't have any issues, it's only when trying to reengage
>>> the 

Re: Stus-List Folding Prop won't open

[Jerome Tauber via CnC-List]

Funny - prop walk seems to be as little understood as sail drive.   I have read 
three different explanations - 1) the pressure on the water on the lower blade 
is higher (the deeper you go the higher the water pressure); 2) the angle of 
the prop shaft and 3) the upward and downward flow of the thrust.   Of all the 
last seems the most probable.  It is explained as follows:


Transverse thrust is of much greater significance when using an astern 
movement.  The helical discharge from a right handed propeller working astern 
splits and passes forward towards either side of the hull.  In doing so it 
behaves quite differently.  On the port quarter it is inclined down and away 
from the hull whilst on the starboard quarter it is directed up and on to the 
hull.  This flow of water striking the starboard quarter can be a substantial 
force capable of swinging the stern to port, giving the classic kick of the bow 
to starboard.

Read more at 
http://www.ybw.com/forums/showthread.php?341281-Prop-walk-Pysical-reason-why-does-this-happen/page5=9d5e1334410d8aca0215750337644810#proEkO42zUH4PEgp.99


 

 

 

-Original Message-
From: Chuck S via CnC-List <cnc-list@cnc-list.com>
To: cnc-list <cnc-list@cnc-list.com>
Cc: Chuck S <cscheaf...@comcast.net>; Jeremy Ralph <jeremy.ra...@gmail.com>
Sent: Wed, Oct 26, 2016 4:18 pm
Subject: Re: Stus-List Folding Prop won't open


FWIW, I heard it explained that propwalk originates because the shaft is at an 
angle to horizontal.  The more angle the more prop walk.  Also, more surface 
area of the prop causes more prop walk.  Sail drives have the least prop walk 
because their shaft is horizontal, not at an angle.  Power boats with outboards 
have very little propwalk.  Powerboats with inboards and angled shafts have the 
most prop walk as their props are huge, too.

Propwalk is not a problem but a sideways thrust that if used wisely, can be 
very helpful at times.

When docking stern first, I get the boat moving where I want it and shift into 
neutral.  I leave the throttle at idle and shift into reverse just long enough 
to keep her moving.  To slow or to stop, I place the shifter into foreward only 
long enough to stop.  Impulse power vs warp power. 

Chuck Scheaffer
Resolute 1990 C 34R


On October 26, 2016 at 1:20 AM Jeremy Ralph via CnC-List 
<cnc-list@cnc-list.com> wrote:



I had issues with my 2 blade Martec though not as bad as you describe.  I would 
open with a clunk, sometimes stick when opening, and have some bad vibrations. 
A surveyor informed me it should be be rebuilt, which is in the works.  I 
replaced it with a 3 blade Campbell Sailer prop, which I'm happy with, although 
reversing with the Martec had way less prop walk.
 
Hey guys, with all of the discussion on props it reminded me that I'm
having an issue with my 2 blade folding prop. Pretty sure it's the Martec
that you all are mentioning.
I continue to have issues with one blade not opening after we've been out
sailing. Once we drop the sails and go to engage the engine and prop it
fails to open one side and I get severe vibrations. Is this a normal thing
with these props? It truly makes me want to just get a fixed prop.
Unfortunately that's not in the budget right now though.
So far I've tried:
   - to come to a complete stop and try again
   - Kick it into reverse and then back to forward
   - short kick to full throttle.

The last time we were out nothing worked. We ended up limping along back to
our slip. Afterwards I checked it by rotating it from the inside and it
sounded like both blades would open when it was facing down because I heard
the clunk.
Occasionally it will open but it's not a first time thing. On departure
from the slip I don't have any issues, it's only when trying to reengage
the motor after a sail. It's really frustratin

___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!


  
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open

[Dennis C. via CnC-List]

Touche's slip is to port when approaching.  I approach slowly about a half
boat length off the piling line.  I've already looked at the windexes of
the stationary boats to determine the wind.  I've looked at the water on
the pilings for any current.

When Touche's shrouds are about center of the slip next to me, I shift to
reverse and turn the bow away from the slip.  With the rudder still hard to
starboard, the boat still has a bit of forward way.  As the boat begins to
gather sternway, I ease the rudder and the throttle.  Prop walk is pulling
the boat past the starboard bow piling and into the slip.  Once clear of
the starboard bow piling, I use the rudder and throttle to back fully into
the slip.  Once in, a bit of forward thrust stops the boat.  Easy.

However, the caveat to "easy" is I've been doing it for 17 years.  The
first few tries were ugly.  It does take a lot of practice to achieve a
smooth stern in docking.  For those who master it, it's a source of pride.
I think I'm the only guy on my pier that can do it smoothly.

And...on occasion, I do completely bungle a docking.  BTW, Touche' has a
Martec 2 blade folder.

My neighbor does things a bit differently.  He motors well past his slip
then backs up and swings into his slip using the rudder.  More of a brute
force approach rather than finesse.

On a few occasions I've had the opportunity to watch the weigh ins at a
couple of fishing tournaments.  The skill of the charter captains is
phenomenal.  They come into a harbor, motor to the center of a fairway, use
the two engines to spin the boat's stern into the fairway, back directly
down the fairway in what seems an impossibly straight line, stop within a
gnat's whisker of the bulkhead, then gently place the boat's stern against
the bulkhead and keep it there with a bit of reverse.  The crew offloads
the catches for weighing, the crowd roars with each weight announcement.
Then, as quickly as it came, the boat is gone.  Amazing seamanship.

Dennis C.
Touche' 35-1 #83
mandeville, LA

On Wed, Oct 26, 2016 at 3:16 PM, Chuck S via CnC-List  wrote:

> FWIW, I heard it explained that propwalk originates because the shaft is
> at an angle to horizontal. The more angle the more prop walk. Also, more
> surface area of the prop causes more prop walk. Sail drives have the least
> prop walk because their shaft is horizontal, not at an angle. Power boats
> with outboards have very little propwalk. Powerboats with inboards and
> angled shafts have the most prop walk as their props are huge, too.
>
> Propwalk is not a problem but a sideways thrust that if used wisely, can
> be very helpful at times.
>
> When docking stern first, I get the boat moving where I want it and shift
> into neutral. I leave the throttle at idle and shift into reverse just long
> enough to keep her moving. To slow or to stop, I place the shifter into
> foreward only long enough to stop. Impulse power vs warp power.
>
> Chuck Scheaffer
> Resolute 1990 C 34R
>
> On October 26, 2016 at 1:20 AM Jeremy Ralph via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
> I had issues with my 2 blade Martec though not as bad as you describe.  I
> would open with a clunk, sometimes stick when opening, and have some bad
> vibrations. A surveyor informed me it should be be rebuilt, which is in the
> works.  I replaced it with a 3 blade Campbell Sailer prop, which I'm
> happy with, although reversing with the Martec had way less prop walk.
>
>
>> Hey guys, with all of the discussion on props it reminded me that I'm
>> having an issue with my 2 blade folding prop. Pretty sure it's the Martec
>> that you all are mentioning.
>> I continue to have issues with one blade not opening after we've been out
>> sailing. Once we drop the sails and go to engage the engine and prop it
>> fails to open one side and I get severe vibrations. Is this a normal thing
>> with these props? It truly makes me want to just get a fixed prop.
>> Unfortunately that's not in the budget right now though.
>> So far I've tried:
>>- to come to a complete stop and try again
>>- Kick it into reverse and then back to forward
>>- short kick to full throttle.
>>
>> The last time we were out nothing worked. We ended up limping along back
>> to
>> our slip. Afterwards I checked it by rotating it from the inside and it
>> sounded like both blades would open when it was facing down because I
>> heard
>> the clunk.
>> Occasionally it will open but it's not a first time thing. On departure
>> from the slip I don't have any issues, it's only when trying to reengage
>> the motor after a sail. It's really frustratin
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
>
>
> ___
>
> This list is supported by 

Re: Stus-List Folding Prop won't open

[Chuck S via CnC-List]

FWIW, I heard it explained that propwalk originates because the shaft is at an 
angle to horizontal. The more angle the more prop walk. Also, more surface area 
of the prop causes more prop walk. Sail drives have the least prop walk because 
their shaft is horizontal, not at an angle. Power boats with outboards have 
very little propwalk. Powerboats with inboards and angled shafts have the most 
prop walk as their props are huge, too.

Propwalk is not a problem but a sideways thrust that if used wisely, can be 
very helpful at times.

When docking stern first, I get the boat moving where I want it and shift into 
neutral. I leave the throttle at idle and shift into reverse just long enough 
to keep her moving. To slow or to stop, I place the shifter into foreward only 
long enough to stop. Impulse power vs warp power.

Chuck Scheaffer
Resolute 1990 C 34R


> On October 26, 2016 at 1:20 AM Jeremy Ralph via CnC-List 
>  wrote:
> 
> I had issues with my 2 blade Martec though not as bad as you describe.  I 
> would open with a clunk, sometimes stick when opening, and have some bad 
> vibrations. A surveyor informed me it should be be rebuilt, which is in the 
> works.  I replaced it with a 3 blade Campbell Sailer prop, which I'm happy 
> with, although reversing with the Martec had way less prop walk.
>  
> 
> > > Hey guys, with all of the discussion on props it reminded me that 
> I'm
> > having an issue with my 2 blade folding prop. Pretty sure it's the 
> > Martec
> > that you all are mentioning.
> > I continue to have issues with one blade not opening after we've 
> > been out
> > sailing. Once we drop the sails and go to engage the engine and 
> > prop it
> > fails to open one side and I get severe vibrations. Is this a 
> > normal thing
> > with these props? It truly makes me want to just get a fixed prop.
> > Unfortunately that's not in the budget right now though.
> > So far I've tried:
> >- to come to a complete stop and try again
> >- Kick it into reverse and then back to forward
> >- short kick to full throttle.
> > 
> > The last time we were out nothing worked. We ended up limping along 
> > back to
> > our slip. Afterwards I checked it by rotating it from the inside 
> > and it
> > sounded like both blades would open when it was facing down because 
> > I heard
> > the clunk.
> > Occasionally it will open but it's not a first time thing. On 
> > departure
> > from the slip I don't have any issues, it's only when trying to 
> > reengage
> > the motor after a sail. It's really frustratin
> > 
> > > ___
> 
> This list is supported by the generous donations of our members. If you 
> wish to make a contribution to offset our costs, please go to: 
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
> 
 
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open

[John and Maryann Read via CnC-List]

Ditto to Dave’s comment.  Our Yanmar 3GM is mounted to a Kanzaki transmission 
that was slipping.  Symptoms were prop did not open symmetrically because was 
not spinning enough so lots of vibration, when it did fully open the shaft was 
not spinning at a rate consistent with the throttle.  No obvious issues with 
the prop manually opening when hauled.  Pulled transmission, got it rebuilt.  
Biggest expense was OEM rebuild kit and needed new cone gear as was polished.  
Reinstalled and problem solved.  When reinstalling it is very important to 
ensure the shift cable is adjusted so the transmission lever is fully engaged 
before the lever on the binnacle is at the end of its travel – ie there is some 
remaining movement for the spring fitting that attaches the cable to the 
transmission lever.  In our case that meant attaching to the inner transmission 
lever hole.  Also, an annual maintenance item is to oil the spring fitting.

 

FWIW, here is the info on my rebuilder.  He is the person who did all the 
transmission work for Mack Boring when they were in the business of rebuilding 
and apparently there are some tricks of the trade to correctly rebuild.  
Shipping was by parcel post, he was very informative and easy to work with.  I 
had the unit returned to me in 7 days.  No affiliation just a happy customer.

 

Rick Neary

East Coast Marine Transmission

253 Vineyard Ave

South Amboy, NJ  08879

732-991-0694

 

John and Maryann

Legacy III

1982 C 34

Noank, CT

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dave S via 
CnC-List
Sent: Tuesday, October 25, 2016 11:02 AM
To: C Stus List
Cc: Dave S
Subject: Stus-List Folding Prop won't open

 

Make sure it's the prop.   I threw a ton of money at similar symptoms before 
learning that the transmission was slipping.  (bang bang bang in forward only, 
and intermittently, though progressively less so.)  

Pulled the gearbox and did the repair myself in an evening for less than  $100 
after replacing a lot of stuff.   

 

Dave.

 

 

 

Message: 1
Date: Tue, 25 Oct 2016 11:43:15 +
From: Kevin Paxton <kpax...@paxdesigns.com>
To: cnc-list@cnc-list.com
Subject: Stus-List Folding Prop won't open
Message-ID:
<caokrqryaxxaxcfer76uuybknzaogfkfydz-tktommg+pcys...@mail.gmail.com 
<mailto:caokrqryaxxaxcfer76uuybknzaogfkfydz-tktommg%2bpcys...@mail.gmail.com> >
Content-Type: text/plain; charset="utf-8"

Hey guys, with all of the discussion on props it reminded me that I'm
having an issue with my 2 blade folding prop. Pretty sure it's the Martec
that you all are mentioning.

I continue to have issues with one blade not opening after we've been out
sailing. Once we drop the sails and go to engage the engine and prop it
fails to open one side and I get severe vibrations. Is this a normal thing
with these props? It truly makes me want to just get a fixed prop.
Unfortunately that's not in the budget right now though.

So far I've tried:

   - to come to a complete stop and try again
   - Kick it into reverse and then back to forward
   - short kick to full throttle.

The last time we were out nothing worked. We ended up limping along back to
our slip. Afterwards I checked it by rotating it from the inside and it
sounded like both blades would open when it was facing down because I heard
the clunk.

Occasionally it will open but it's not a first time thing. On departure
from the slip I don't have any issues, it's only when trying to reengage
the motor after a sail. It's really frustrating, any ideas?

Kevin Paxton
'82 34 #473
Japhys Spirit
Cornfield Creek, Magothy River, MD

___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List Folding Prop won't open

[Jeremy Ralph via CnC-List]

I had issues with my 2 blade Martec though not as bad as you describe.  I
would open with a clunk, sometimes stick when opening, and have some bad
vibrations. A surveyor informed me it should be be rebuilt, which is in the
works.  I replaced it with a 3 blade Campbell Sailer prop, which I'm happy
with, although reversing with the Martec had way less prop walk.


> Hey guys, with all of the discussion on props it reminded me that I'm
> having an issue with my 2 blade folding prop. Pretty sure it's the Martec
> that you all are mentioning.
> I continue to have issues with one blade not opening after we've been out
> sailing. Once we drop the sails and go to engage the engine and prop it
> fails to open one side and I get severe vibrations. Is this a normal thing
> with these props? It truly makes me want to just get a fixed prop.
> Unfortunately that's not in the budget right now though.
> So far I've tried:
>- to come to a complete stop and try again
>- Kick it into reverse and then back to forward
>- short kick to full throttle.
>
> The last time we were out nothing worked. We ended up limping along back to
> our slip. Afterwards I checked it by rotating it from the inside and it
> sounded like both blades would open when it was facing down because I heard
> the clunk.
> Occasionally it will open but it's not a first time thing. On departure
> from the slip I don't have any issues, it's only when trying to reengage
> the motor after a sail. It's really frustratin
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Re: Stus-List Folding Prop won't open

[Kevin Paxton via CnC-List]

Thanks for the tips, I'll have to check it out more the next time I haul or
dive on it.

On Tue, Oct 25, 2016, 11:02 Dave S via CnC-List <cnc-list@cnc-list.com>
wrote:

> Make sure it's the prop.   I threw a ton of money at similar symptoms
> before learning that the transmission was slipping.  (bang bang bang in
> forward only, and intermittently, though progressively less so.)
> Pulled the gearbox and did the repair myself in an evening for less than
> $100 after replacing a lot of stuff.
>
> Dave.
>
>
>
> Message: 1
> Date: Tue, 25 Oct 2016 11:43:15 +
> From: Kevin Paxton <kpax...@paxdesigns.com>
> To: cnc-list@cnc-list.com
> Subject: Stus-List Folding Prop won't open
> Message-ID:
> <
> caokrqryaxxaxcfer76uuybknzaogfkfydz-tktommg+pcys...@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
>
> Hey guys, with all of the discussion on props it reminded me that I'm
> having an issue with my 2 blade folding prop. Pretty sure it's the Martec
> that you all are mentioning.
>
> I continue to have issues with one blade not opening after we've been out
> sailing. Once we drop the sails and go to engage the engine and prop it
> fails to open one side and I get severe vibrations. Is this a normal thing
> with these props? It truly makes me want to just get a fixed prop.
> Unfortunately that's not in the budget right now though.
>
> So far I've tried:
>
>- to come to a complete stop and try again
>- Kick it into reverse and then back to forward
>- short kick to full throttle.
>
>
> The last time we were out nothing worked. We ended up limping along back to
> our slip. Afterwards I checked it by rotating it from the inside and it
> sounded like both blades would open when it was facing down because I heard
> the clunk.
>
> Occasionally it will open but it's not a first time thing. On departure
> from the slip I don't have any issues, it's only when trying to reengage
> the motor after a sail. It's really frustrating, any ideas?
>
> Kevin Paxton
> '82 34 #473
> Japhys Spirit
> Cornfield Creek, Magothy River, MD
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
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make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List Folding Prop won't open

[Dave S via CnC-List]

Make sure it's the prop.   I threw a ton of money at similar symptoms
before learning that the transmission was slipping.  (bang bang bang in
forward only, and intermittently, though progressively less so.)
Pulled the gearbox and did the repair myself in an evening for less than
$100 after replacing a lot of stuff.

Dave.



Message: 1
Date: Tue, 25 Oct 2016 11:43:15 +
From: Kevin Paxton <kpax...@paxdesigns.com>
To: cnc-list@cnc-list.com
Subject: Stus-List Folding Prop won't open
Message-ID:
<caokrqryaxxaxcfer76uuybknzaogfkfydz-tktommg+pcys...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hey guys, with all of the discussion on props it reminded me that I'm
having an issue with my 2 blade folding prop. Pretty sure it's the Martec
that you all are mentioning.

I continue to have issues with one blade not opening after we've been out
sailing. Once we drop the sails and go to engage the engine and prop it
fails to open one side and I get severe vibrations. Is this a normal thing
with these props? It truly makes me want to just get a fixed prop.
Unfortunately that's not in the budget right now though.

So far I've tried:

   - to come to a complete stop and try again
   - Kick it into reverse and then back to forward
   - short kick to full throttle.

The last time we were out nothing worked. We ended up limping along back to
our slip. Afterwards I checked it by rotating it from the inside and it
sounded like both blades would open when it was facing down because I heard
the clunk.

Occasionally it will open but it's not a first time thing. On departure
from the slip I don't have any issues, it's only when trying to reengage
the motor after a sail. It's really frustrating, any ideas?

Kevin Paxton
'82 34 #473
Japhys Spirit
Cornfield Creek, Magothy River, MD
___

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make a contribution to offset our costs, please go to:  
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Re: Stus-List Folding Prop won't open

[tom via CnC-List]

This happened to me also. Your prop is closing too tightly. There needs to
be some space between the blades when they close. The edges at the pin have
worn and need to have material added so that the blades do not fold
completely. More than likely the opposite is also occurring where the
blades are over opening and need some material added to those surface as
well.
Send it to Martec...it will cost about $125.

Tom Oryniak
33-1
Raritan Bay

On Tue, Oct 25, 2016 at 7:43 AM, Kevin Paxton via CnC-List <
cnc-list@cnc-list.com> wrote:

> Hey guys, with all of the discussion on props it reminded me that I'm
> having an issue with my 2 blade folding prop. Pretty sure it's the Martec
> that you all are mentioning.
>
> I continue to have issues with one blade not opening after we've been out
> sailing. Once we drop the sails and go to engage the engine and prop it
> fails to open one side and I get severe vibrations. Is this a normal thing
> with these props? It truly makes me want to just get a fixed prop.
> Unfortunately that's not in the budget right now though.
>
> So far I've tried:
>
>- to come to a complete stop and try again
>- Kick it into reverse and then back to forward
>- short kick to full throttle.
>
> The last time we were out nothing worked. We ended up limping along back
> to our slip. Afterwards I checked it by rotating it from the inside and it
> sounded like both blades would open when it was facing down because I heard
> the clunk.
>
> Occasionally it will open but it's not a first time thing. On departure
> from the slip I don't have any issues, it's only when trying to reengage
> the motor after a sail. It's really frustrating, any ideas?
>
> Kevin Paxton
> '82 34 #473
> Japhys Spirit
> Cornfield Creek, Magothy River, MD
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List Folding Prop won't open

[David Kaseler via CnC-List]

We've lived with a Martel two bladed folding prop forever. Occasionally one 
blade will not open but putting it in reverse and back into forward has always 
worked for us. Each time we haul out (once every two or three years here in the 
Northwest) we remove the blades and thoroughly clean and polish all the parts. 
Maybe that helps. We also apply a little grease to the moving parts but I'm not 
sure that makes any difference. If I were having your problem I would look 
closely at the surfaces that move against each other to be sure there are no 
burrs which might cause the blades to hang up against each other.
Dave.

Sent from my iPad

> On Oct 25, 2016, at 4:43 AM, Kevin Paxton via CnC-List 
>  wrote:
> 
> Hey guys, with all of the discussion on props it reminded me that I'm having 
> an issue with my 2 blade folding prop. Pretty sure it's the Martec that you 
> all are mentioning.
> 
> I continue to have issues with one blade not opening after we've been out 
> sailing. Once we drop the sails and go to engage the engine and prop it fails 
> to open one side and I get severe vibrations. Is this a normal thing with 
> these props? It truly makes me want to just get a fixed prop. Unfortunately 
> that's not in the budget right now though. 
> 
> So far I've tried: 
> to come to a complete stop and try again
> Kick it into reverse and then back to forward
> short kick to full throttle. 
> The last time we were out nothing worked. We ended up limping along back to 
> our slip. Afterwards I checked it by rotating it from the inside and it 
> sounded like both blades would open when it was facing down because I heard 
> the clunk.
> 
> Occasionally it will open but it's not a first time thing. On departure from 
> the slip I don't have any issues, it's only when trying to reengage the motor 
> after a sail. It's really frustrating, any ideas?
> 
> Kevin Paxton
> '82 34 #473
> Japhys Spirit
> Cornfield Creek, Magothy River, MD
> 
> ___
> 
> This list is supported by the generous donations of our members. If you wish 
> to make a contribution to offset our costs, please go to:  
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List Folding Prop won't open

[Kevin Paxton via CnC-List]

Hey guys, with all of the discussion on props it reminded me that I'm
having an issue with my 2 blade folding prop. Pretty sure it's the Martec
that you all are mentioning.

I continue to have issues with one blade not opening after we've been out
sailing. Once we drop the sails and go to engage the engine and prop it
fails to open one side and I get severe vibrations. Is this a normal thing
with these props? It truly makes me want to just get a fixed prop.
Unfortunately that's not in the budget right now though.

So far I've tried:

   - to come to a complete stop and try again
   - Kick it into reverse and then back to forward
   - short kick to full throttle.

The last time we were out nothing worked. We ended up limping along back to
our slip. Afterwards I checked it by rotating it from the inside and it
sounded like both blades would open when it was facing down because I heard
the clunk.

Occasionally it will open but it's not a first time thing. On departure
from the slip I don't have any issues, it's only when trying to reengage
the motor after a sail. It's really frustrating, any ideas?

Kevin Paxton
'82 34 #473
Japhys Spirit
Cornfield Creek, Magothy River, MD
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!