Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[David Risch via CnC-List]

You may want to replace the lift pump.anyway  and use the electric pump as 
backup and for bleeding.

From: CnC-List  on behalf of Luke Wolbrink via 
CnC-List 
Sent: Sunday, August 18, 2019 10:42:42 AM
To: cnc-list@cnc-list.com 
Cc: Luke Wolbrink 
Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

I recently had a similar issue where the engine would drop RPM's under load and 
eventaully stumble and die. It ended up being the fuel lift pump was on it's 
last legs and just not getting enough fuel to the high pressure pump once the 
fuel level in the tank was low enough not to just siphon. Instead of replacing 
with a yanmar part for $$$ I bought an electric fuel pump on amazon for under 
$20 and wired it into the key switch, works perfect and not more problems.

hope that helps.

~Luke
SV Zella 1985 35-3

On Sun, Aug 18, 2019 at 9:29 AM 
mailto:cnc-list-requ...@cnc-list.com>> wrote:
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When replying, please edit your Subject line so it is more specific
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Today's Topics:

   1.  Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor)
   2. Re:  Yanmar 2GMF losing power under load/RPMs drop (Robert Boyer)
   3. Re:  Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor)
   4. Re:  Yanmar 2GMF losing power under load/RPMs drop
  (Jeff Helsdingen)
   5. Re:  Yanmar 2GMF losing power under load/RPMs drop (ALAN BERGEN)
   6. Re:  Yanmar 2GMF losing power under load/RPMs drop (Paul Baker)
   7. Re:  Yanmar 2GMF losing power under load/RPMs drop
  (John and Maryann Read)
   8. Re:  Yanmar 2GMF losing power under load/RPMs drop (Bill)



-- Forwarded message --
From: Eugene Fodor mailto:efo...@gmail.com>>
To: cnc-list mailto:cnc-list@cnc-list.com>>
Cc:
Bcc:
Date: Sat, 17 Aug 2019 19:13:31 -0500
Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop
My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also 
appears to drift a bit while operating at a fixed throttle. Tied at the dock 
forward seems to have more difficulty that reverse. I should be able to get up 
to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm 
only getting to about 2500-2800. When I open the throttle wide it in gear it 
initially goes to high RPMs and then drops back. I replaced the fuel filter and 
the symptom remains the same. Any thoughts on what to look for and approaches 
to debug?

I've got the service manual and Don Casey's book on small engines, but nothing 
is matching the symptoms in trouble shooting exactly well.

So my theories are (in approximate order of suspicion from my novice 
perspective based on reading)

Governor is faulty and needs adjustment
Injector faulty
Fuel pump issue
Air/water in fuel (I think I've mostly ruled this out)





-- Forwarded message --
From: Robert Boyer mailto:dainyr...@icloud.com>>
To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>
Cc: Eugene Fodor mailto:efo...@gmail.com>>
Bcc:
Date: Sat, 17 Aug 2019 20:27:57 -0400
Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
While this may not help you with your diesel issue, in the 36 years that I have 
owned my boat, I have never even tried to achieve RPMs above about 2800.  I can 
achieve hull speed at 2600 RPMs and I generally cruise at 2400 RPM.

Bob Boyer
s/v Rainy Days
C Landfall 38 (Hull # 230)
(Presently in Baltimore for the summer)
blog: dainyrays.blogspot.com<http://dainyrays.blogspot.com>
email: dainyr...@icloud.com<mailto:dainyr...@icloud.com>

> On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List 
> mailto:cnc-list@cnc-list.com>> wrote:
>
> My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It 
> also appears to drift a bit while operating at a fixed throttle. Tied at the 
> dock forward seems to have more difficulty that reverse. I should be able to 
> get up to 3200-3400 RPM (and have been able to in recent times with no issue, 
> but I'm only getting to about 2500-2800. When I open the throttle wide it in 
> gear it initially goes to high RPMs and then drops back. I replaced the fuel 
> filter and the symptom remains the same. Any thoughts on what to look for and 
> approaches to debug?
>
> I've got the service manual and Don Casey's book on small engines, but 
> nothing is matching the symptoms in 

Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Luke Wolbrink via CnC-List]

I recently had a similar issue where the engine would drop RPM's under load
and eventaully stumble and die. It ended up being the fuel lift pump was on
it's last legs and just not getting enough fuel to the high pressure pump
once the fuel level in the tank was low enough not to just siphon. Instead
of replacing with a yanmar part for $$$ I bought an electric fuel pump on
amazon for under $20 and wired it into the key switch, works perfect and
not more problems.

hope that helps.

~Luke
SV Zella 1985 35-3

On Sun, Aug 18, 2019 at 9:29 AM  wrote:

> Send CnC-List mailing list submissions to
> cnc-list@cnc-list.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
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> or, via email, send a message with subject or body 'help' to
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>
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of CnC-List digest..."
> Today's Topics:
>
>1.  Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor)
>2. Re:  Yanmar 2GMF losing power under load/RPMs drop (Robert Boyer)
>3. Re:  Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor)
>4. Re:  Yanmar 2GMF losing power under load/RPMs drop
>   (Jeff Helsdingen)
>5. Re:  Yanmar 2GMF losing power under load/RPMs drop (ALAN BERGEN)
>6. Re:  Yanmar 2GMF losing power under load/RPMs drop (Paul Baker)
>7. Re:  Yanmar 2GMF losing power under load/RPMs drop
>   (John and Maryann Read)
>8. Re:  Yanmar 2GMF losing power under load/RPMs drop (Bill)
>
>
>
> -- Forwarded message --
> From: Eugene Fodor 
> To: cnc-list 
> Cc:
> Bcc:
> Date: Sat, 17 Aug 2019 19:13:31 -0500
> Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop
> My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It
> also appears to drift a bit while operating at a fixed throttle. Tied at
> the dock forward seems to have more difficulty that reverse. I should be
> able to get up to 3200-3400 RPM (and have been able to in recent times with
> no issue, but I'm only getting to about 2500-2800. When I open the throttle
> wide it in gear it initially goes to high RPMs and then drops back. I
> replaced the fuel filter and the symptom remains the same. Any thoughts on
> what to look for and approaches to debug?
>
> I've got the service manual and Don Casey's book on small engines, but
> nothing is matching the symptoms in trouble shooting exactly well.
>
> So my theories are (in approximate order of suspicion from my novice
> perspective based on reading)
>
> Governor is faulty and needs adjustment
> Injector faulty
> Fuel pump issue
> Air/water in fuel (I think I've mostly ruled this out)
>
>
>
>
>
> ------ Forwarded message --
> From: Robert Boyer 
> To: cnc-list@cnc-list.com
> Cc: Eugene Fodor 
> Bcc:
> Date: Sat, 17 Aug 2019 20:27:57 -0400
> Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
> While this may not help you with your diesel issue, in the 36 years that I
> have owned my boat, I have never even tried to achieve RPMs above about
> 2800.  I can achieve hull speed at 2600 RPMs and I generally cruise at 2400
> RPM.
>
> Bob Boyer
> s/v Rainy Days
> C Landfall 38 (Hull # 230)
> (Presently in Baltimore for the summer)
> blog: dainyrays.blogspot.com
> email: dainyr...@icloud.com
>
> > On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List <
> cnc-list@cnc-list.com> wrote:
> >
> > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load.
> It also appears to drift a bit while operating at a fixed throttle. Tied at
> the dock forward seems to have more difficulty that reverse. I should be
> able to get up to 3200-3400 RPM (and have been able to in recent times with
> no issue, but I'm only getting to about 2500-2800. When I open the throttle
> wide it in gear it initially goes to high RPMs and then drops back. I
> replaced the fuel filter and the symptom remains the same. Any thoughts on
> what to look for and approaches to debug?
> >
> > I've got the service manual and Don Casey's book on small engines, but
> nothing is matching the symptoms in trouble shooting exactly well.
> >
> > So my theories are (in approximate order of suspicion from my novice
> perspective based on reading)
> >
> > Governor is faulty and needs adjustment
> > Injector faulty
> > Fuel pump issue
> > Air/water in fuel (I think I've mostly ruled this out)
> >
> >
> > __

Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Bill via CnC-List]

Maybe group in the pickup tube? Try disconnecting it and blowing it outBill ColemanOn Aug 17, 2019 8:13 PM, Eugene Fodor via CnC-List  wrote:My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly wellSo my theories are (in approximate order of suspicion from my novice perspective based on reading)Governor is faulty and needs adjustmentInjector faultyFuel pump issueAir/water in fuel (I think I've mostly ruled this out) 
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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[John and Maryann Read via CnC-List]

Exhaust elbow

 

 

John and Maryann

Legacy III

1982 C 34

Noank, CT

 

 

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Eugene Fodor 
via CnC-List
Sent: Saturday, August 17, 2019 8:14 PM
To: cnc-list
Cc: Eugene Fodor
Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop

 

My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also 
appears to drift a bit while operating at a fixed throttle. Tied at the dock 
forward seems to have more difficulty that reverse. I should be able to get up 
to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm 
only getting to about 2500-2800. When I open the throttle wide it in gear it 
initially goes to high RPMs and then drops back. I replaced the fuel filter and 
the symptom remains the same. Any thoughts on what to look for and approaches 
to debug? 

 

I've got the service manual and Don Casey's book on small engines, but nothing 
is matching the symptoms in trouble shooting exactly well.

 

So my theories are (in approximate order of suspicion from my novice 
perspective based on reading)

 

Governor is faulty and needs adjustment

Injector faulty

Fuel pump issue

Air/water in fuel (I think I've mostly ruled this out)

 

 

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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Paul Baker via CnC-List]

Any smoke while this is happening?


From: CnC-List  on behalf of Eugene Fodor via 
CnC-List 
Sent: August 17, 2019 5:13 PM
To: cnc-list 
Cc: Eugene Fodor 
Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop

My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also 
appears to drift a bit while operating at a fixed throttle. Tied at the dock 
forward seems to have more difficulty that reverse. I should be able to get up 
to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm 
only getting to about 2500-2800. When I open the throttle wide it in gear it 
initially goes to high RPMs and then drops back. I replaced the fuel filter and 
the symptom remains the same. Any thoughts on what to look for and approaches 
to debug?

I've got the service manual and Don Casey's book on small engines, but nothing 
is matching the symptoms in trouble shooting exactly well.

So my theories are (in approximate order of suspicion from my novice 
perspective based on reading)

Governor is faulty and needs adjustment
Injector faulty
Fuel pump issue
Air/water in fuel (I think I've mostly ruled this out)


___

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every one is greatly appreciated.  If you want to support the list - use PayPal 
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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[ALAN BERGEN via CnC-List]

It could be your mixing elbow. Remove it and see whether it's clogged. If
yes, you can scrape it out, or have a radiator shop boil it out.

Alan Bergen
35 Mk III Thirsty
Rose City YC
Portland, OR

On Sat, Aug 17, 2019 at 5:14 PM Eugene Fodor via CnC-List <
cnc-list@cnc-list.com> wrote:

> My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It
> also appears to drift a bit while operating at a fixed throttle. Tied at
> the dock forward seems to have more difficulty that reverse. I should be
> able to get up to 3200-3400 RPM (and have been able to in recent times with
> no issue, but I'm only getting to about 2500-2800. When I open the throttle
> wide it in gear it initially goes to high RPMs and then drops back. I
> replaced the fuel filter and the symptom remains the same. Any thoughts on
> what to look for and approaches to debug?
>
> I've got the service manual and Don Casey's book on small engines, but
> nothing is matching the symptoms in trouble shooting exactly well.
>
> So my theories are (in approximate order of suspicion from my novice
> perspective based on reading)
>
> Governor is faulty and needs adjustment
> Injector faulty
> Fuel pump issue
> Air/water in fuel (I think I've mostly ruled this out)
>
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.paypal.me_stumurray=DwICAg=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI=9w3G7Cf8YfQnrjmtuNxwDJYr3JMv9f1pAfgAJ9xXYQQ=J7yR_wioiYdv_W5vUkFkJJXcELH0RCiI3zMJI2QdlOM=MzpJcmBodkNtQt6LCSMy7duJv46NR659jwqyhr-gyzo=
>
>
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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Jeff Helsdingen via CnC-List]

Possibly the exhaust mixing elbow is getting clogged up?

On Sat, Aug 17, 2019 at 9:20 PM Eugene Fodor via CnC-List <
cnc-list@cnc-list.com> wrote:

> Yeah, unfortunately that doesn't help, in forward gear I'm not even
> consistently hitting 2800 (more like 25-26). I've been able to get up to
> 3600 so something is definitely wrong and has changed for the worse. Also,
> prop and shaft look fine. I dove the boat while we were out and it all
> checks out. My boat hits hull speed around 28-29 in calm water.
>
> Gene Fodor
> s/v Hawk
> C 29 mk 2
>
> On Sat, Aug 17, 2019 at 7:28 PM Robert Boyer  wrote:
>
>> While this may not help you with your diesel issue, in the 36 years that
>> I have owned my boat, I have never even tried to achieve RPMs above about
>> 2800.  I can achieve hull speed at 2600 RPMs and I generally cruise at 2400
>> RPM.
>>
>> Bob Boyer
>> s/v Rainy Days
>> C Landfall 38 (Hull # 230)
>> (Presently in Baltimore for the summer)
>> blog: dainyrays.blogspot.com
>> email: dainyr...@icloud.com
>>
>> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Eugene Fodor via CnC-List]

Yeah, unfortunately that doesn't help, in forward gear I'm not even
consistently hitting 2800 (more like 25-26). I've been able to get up to
3600 so something is definitely wrong and has changed for the worse. Also,
prop and shaft look fine. I dove the boat while we were out and it all
checks out. My boat hits hull speed around 28-29 in calm water.

Gene Fodor
s/v Hawk
C 29 mk 2

On Sat, Aug 17, 2019 at 7:28 PM Robert Boyer  wrote:

> While this may not help you with your diesel issue, in the 36 years that I
> have owned my boat, I have never even tried to achieve RPMs above about
> 2800.  I can achieve hull speed at 2600 RPMs and I generally cruise at 2400
> RPM.
>
> Bob Boyer
> s/v Rainy Days
> C Landfall 38 (Hull # 230)
> (Presently in Baltimore for the summer)
> blog: dainyrays.blogspot.com
> email: dainyr...@icloud.com
>
>
___

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every one is greatly appreciated.  If you want to support the list - use PayPal 
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Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop

[Robert Boyer via CnC-List]

While this may not help you with your diesel issue, in the 36 years that I have 
owned my boat, I have never even tried to achieve RPMs above about 2800.  I can 
achieve hull speed at 2600 RPMs and I generally cruise at 2400 RPM.

Bob Boyer
s/v Rainy Days
C Landfall 38 (Hull # 230)
(Presently in Baltimore for the summer)
blog: dainyrays.blogspot.com
email: dainyr...@icloud.com

> On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List 
>  wrote:
> 
> My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It 
> also appears to drift a bit while operating at a fixed throttle. Tied at the 
> dock forward seems to have more difficulty that reverse. I should be able to 
> get up to 3200-3400 RPM (and have been able to in recent times with no issue, 
> but I'm only getting to about 2500-2800. When I open the throttle wide it in 
> gear it initially goes to high RPMs and then drops back. I replaced the fuel 
> filter and the symptom remains the same. Any thoughts on what to look for and 
> approaches to debug? 
> 
> I've got the service manual and Don Casey's book on small engines, but 
> nothing is matching the symptoms in trouble shooting exactly well.
> 
> So my theories are (in approximate order of suspicion from my novice 
> perspective based on reading)
> 
> Governor is faulty and needs adjustment
> Injector faulty
> Fuel pump issue
> Air/water in fuel (I think I've mostly ruled this out)
> 
>  
> ___
> 
> Thanks everyone for supporting this list with your contributions.  Each and 
> every one is greatly appreciated.  If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray
> 


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Re: Stus-List yanmar 2gmf in 29-2

[Josh Muckley via CnC-List]

In my video I discuss how I bleed my engine.  I show JB weld stick on the
HP injector bleed screw which is notorious for leaking/coming loose.  As
Russ says, the bleed screws on the filter also regularly leak so I plug
those with JB weld as.

The banjo bolt going into the lift pump is (IMO) slightly too long.  It
tends to bottom out and not provide good enough tension on the gaskets
(copper or dowty).  I've had the most success by doubling up the dowty
washers on that particular bolt.

Josh



On Wed, Dec 26, 2018, 9:24 PM Russ & Melody via CnC-List <
cnc-list@cnc-list.com> wrote:

>
> Hi Bev,
>
> I had a leak at the bleed screw gasket on a filter top. Being the
> filter between lift pump & injector pump.
>
> I verified the location by putting little wraps of paper towel around
> the system connections. The leak quickly discolours the paper towel,
> even before you can smell it.
>
>  Cheers, Russ
>  ex - 35 mk-1
>
> At 12:34 PM 12/26/2018, you wrote:
> >Content-Type: multipart/alternative;
> > boundary="=_Part_2793283_850607002.1545856449296"
> >Content-Length: 797
> >
> >I knew I had a fuel leak. Thought it was the lift pump so replaced
> >it. Still the problem persists somewhere. Is there an obvious place
> >to start looking?
> >___
> >
> >Thanks everyone for supporting this list with your
> >contributions.  Each and every one is greatly appreciated.  If you
> >want to support the list - use PayPal to send contribution
> >--   https://www.paypal.me/stumurray
>
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

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Re: Stus-List yanmar 2gmf in 29-2

[Russ & Melody via CnC-List]

Hi Bev,

I had a leak at the bleed screw gasket on a filter top. Being the 
filter between lift pump & injector pump.


I verified the location by putting little wraps of paper towel around 
the system connections. The leak quickly discolours the paper towel, 
even before you can smell it.


Cheers, Russ
ex - 35 mk-1

At 12:34 PM 12/26/2018, you wrote:

Content-Type: multipart/alternative;
boundary="=_Part_2793283_850607002.1545856449296"
Content-Length: 797

I knew I had a fuel leak. Thought it was the lift pump so replaced 
it. Still the problem persists somewhere. Is there an obvious place 
to start looking?

___

Thanks everyone for supporting this list with your 
contributions.  Each and every one is greatly appreciated.  If you 
want to support the list - use PayPal to send contribution 
--   https://www.paypal.me/stumurray



___

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Re: Stus-List yanmar 2gmf in 29-2

[Marek Dziedzic via CnC-List]

Fuel can leak from just about anywhere (:-).

If you have a Racor filter, there are numerous places - mine was leaking from 
under the manual pump that is used for priming.

Good luck.

Marek

1994 C270 ”Legato”(with  Perkins M20)
Ottawa, ON



From: CnC-List  On Behalf Of Bev Parslow via 
CnC-List
Sent: Wednesday, December 26, 2018 15:34
To: cnc-list@cnc-list.com
Cc: Bev Parslow 
Subject: Stus-List yanmar 2gmf in 29-2

I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still 
the problem persists somewhere. Is there an obvious place to start looking?
___

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Re: Stus-List yanmar 2gmf in 29-2

[Chuck Gilchrest via CnC-List]

All your fuel lines are external so finding leaks should be a matter of running 
the motor and looking and feeling for moisture.  Is fuel puddling under the 
motor?  Copper sealing gaskets around banjo fittings should be replaced each 
time the bolt is loosened when you bleed the system.  I keep a dozen on board 
for this reason.  Feed lines to injectors also need to seat securely or fuel 
can leak.
My 3HM had a leak from the filter housing right before the high pressure pump 
caused by over tightening the cap which cracked the thin aluminum casting.  Any 
little thing can cause a leak.
Chuck Gilchrest 
S/V Half Magic
1983 35 LF
Padanaram MA

Sent from my iPhone

> On Dec 26, 2018, at 4:43 PM, Josh Muckley via CnC-List 
>  wrote:
> 
> Fuel leak into the engine? Or out?  What signs and simptoms are you 
> experiencing?
> 
> Josh Muckley 
> S/V Sea Hawk 
> 1989 C 37+
> Solomons, MD 
> 
> 
> 
>> On Wed, Dec 26, 2018, 3:34 PM Bev Parslow via CnC-List 
>>  wrote:
>> I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still 
>> the problem persists somewhere. Is there an obvious place to start looking? 
>> ___
>> 
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>> every one is greatly appreciated.  If you want to support the list - use 
>> PayPal to send contribution --   https://www.paypal.me/stumurray
>> 
> ___
> 
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> every one is greatly appreciated.  If you want to support the list - use 
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> 
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Re: Stus-List yanmar 2gmf in 29-2

[Josh Muckley via CnC-List]

Fuel leak into the engine? Or out?  What signs and simptoms are you
experiencing?

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



On Wed, Dec 26, 2018, 3:34 PM Bev Parslow via CnC-List <
cnc-list@cnc-list.com> wrote:

> I knew I had a fuel leak. Thought it was the lift pump so replaced it.
> Still the problem persists somewhere. Is there an obvious place to start
> looking?
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
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Re: Stus-List Yanmar 2gmf

[Michael Crombie via CnC-List]

Hi Bev,

I'm a bit confused by your description. By "round" attachment, do you mean
cylindrical?  My first thought is that this is your secondary fuel filter
and the bleed nut is open.  This filter is located on the front of the
engine (trace the fuel line from the fuel pump).   But then your reference
to the mixing elbow is what got me confused. It is at the rear of the
engine and there shouldn't be any fuel coming out anywhere near there
(maybe your return fuel line has a leak??)

Mike

On Thu, May 3, 2018, 12:21 PM Bev Parslow via CnC-List, <
cnc-list@cnc-list.com> wrote:

> Seem to be loosing some fuel. The tank is good. There is no leak from the
> tank to the primary filter. It then goes to the engine. No leak there.
> Pardon my ignorance but there is a round attachment with a gasket on the
> top that seems to be leaking. There are some small  screws? bolts? holding
> it down. It seems to be oozing from there. Can I tighten them leaving
> everything together or do I need to take the mixing elbow off?
> Yanmar 2gmf.
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
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Re: Stus-List Yanmar 2gmf

[Josh Muckley via CnC-List]

Send us a picture.

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

On Thu, May 3, 2018, 12:21 PM Bev Parslow via CnC-List <
cnc-list@cnc-list.com> wrote:

> Seem to be loosing some fuel. The tank is good. There is no leak from the
> tank to the primary filter. It then goes to the engine. No leak there.
> Pardon my ignorance but there is a round attachment with a gasket on the
> top that seems to be leaking. There are some small  screws? bolts? holding
> it down. It seems to be oozing from there. Can I tighten them leaving
> everything together or do I need to take the mixing elbow off?
> Yanmar 2gmf.
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

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Re: Stus-List Yanmar 2gmf

[Joel Aronson via CnC-List]

Is it the fuel filter shown on page 83 of this:
https://www.yanmarshop.com/Media/Default/Documents/1GM-2GM(F)-3GM(F)-3HM(F)%20Owners%20Manual%20(2J020A1279).pdf

Joel

On Thu, May 3, 2018 at 12:31 PM, Gary Nylander via CnC-List <
cnc-list@cnc-list.com> wrote:

> Could that ‘attachment’ be the engine fuel filter? You said ‘primary’
> filter, is that the first one on the tank side? Mine has a big plastic
> Racor about a foot from the tank and then it is routed to a fuel pump
> mounted on the engine then to a small filter near the top of the engine,
> then to the high pressure pump and to the injectors. Make sense?
>
>
>
> Gary
>
> 2QM15
>
> *From:* CnC-List  *On Behalf Of *Bev
> Parslow via CnC-List
> *Sent:* Thursday, May 3, 2018 12:21 PM
> *To:* cnc-list@cnc-list.com
> *Cc:* Bev Parslow 
> *Subject:* Stus-List Yanmar 2gmf
>
>
>
> Seem to be loosing some fuel. The tank is good. There is no leak from the
> tank to the primary filter. It then goes to the engine. No leak there.
> Pardon my ignorance but there is a round attachment with a gasket on the
> top that seems to be leaking. There are some small  screws? bolts? holding
> it down. It seems to be oozing from there. Can I tighten them leaving
> everything together or do I need to take the mixing elbow off?
>
> Yanmar 2gmf.
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>


-- 
Joel
301 541 8551
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Re: Stus-List Yanmar 2gmf

[Gary Nylander via CnC-List]

Could that ‘attachment’ be the engine fuel filter? You said ‘primary’ filter, 
is that the first one on the tank side? Mine has a big plastic Racor about a 
foot from the tank and then it is routed to a fuel pump mounted on the engine 
then to a small filter near the top of the engine, then to the high pressure 
pump and to the injectors. Make sense?

 

Gary

2QM15

From: CnC-List  On Behalf Of Bev Parslow via 
CnC-List
Sent: Thursday, May 3, 2018 12:21 PM
To: cnc-list@cnc-list.com
Cc: Bev Parslow 
Subject: Stus-List Yanmar 2gmf

 

Seem to be loosing some fuel. The tank is good. There is no leak from the tank 
to the primary filter. It then goes to the engine. No leak there. Pardon my 
ignorance but there is a round attachment with a gasket on the top that seems 
to be leaking. There are some small  screws? bolts? holding it down. It seems 
to be oozing from there. Can I tighten them leaving everything together or do I 
need to take the mixing elbow off?

Yanmar 2gmf.

___

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every one is greatly appreciated.  If you want to support the list - use PayPal 
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