Russ,
Thought of that but by the time I buy the parts ($300++) I exceeded the cost of
a new one ($300) I found on-line with none of the headaches and worries of a
rebuild.
Thank though...
David F. Risch
1981 40-2
(401) 419-4650 (cell)
Date: Tue, 19 May 2015 11:43:51 -0700
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Impeller Damn...
From: cnc-list@cnc-list.com
CC: russ...@telus.net
Hi David,
Probably a pitted shaft at the seal area. Replace shaft & seal no big
deal, assess bearing(s) at the same time.
Cheers,
Russ
Sweet
35 mk-1
At 06:04 PM 18/05/2015, you wrote:
Rick,
Thank you. Correct on all counts except the missing vane is
from the impeller which internally circulates the glycol.
I need to do a bit of digging around the Sen-Dur exchanger and its
design. Flat out at work all week and will be back out it
this weekend.
FYI...The raw water pump needs to be replaced too. Leaking
shaft. $400 for a pump. Whodathunk?
Damn.
David F. Risch
(401) 419-4650 (cell)
To: cnc-list@cnc-list.com
Date: Mon, 18 May 2015 18:44:59 -0400
Subject: Re: Stus-List Impeller Damn...
From: cnc-list@cnc-list.com
CC: rickbr...@earthlink.net
David,
If I’m not mistaken, having the Sen-Dur retrofit makes it a fresh water
cooled engine, not raw water.
Two water pumps, right? The pump on the front of the engine circulates
water/glycol through the engine block and to the heat exchanger, the
second pumps sea water to the heat exchanger and then to the exhaust
mixing elbow?
If that is the case, and the impeller blade is from the sea water pump,
there is about a 90% chance the blade is in the heat exchanger.
Rick Brass
Washington, NC
From: CnC-List
[
mailto:cnc-list-boun...@cnc-list.com] On Behalf Of David via
CnC-List
Sent: Sunday, May 17, 2015 6:01 PM
To: CNC CNC
Cc: David
Subject: Re: Stus-List Impeller Damn...
Thanks all.
Checked obvious hose areas. Nothing. Ran it today on the hard,
seemed fine, Will be launched tomorrow. As we are Bermuda
bound in June I need to find that puppy as it will invariably find its
way to the worst spot at the worst time. My guess its in the
after market (Sen-Dur) heat exchanger.
Wish me luck.
David F. Risch
1981 40-2
(401) 419-4650 (cell)
Date: Sun, 17 May 2015 16:11:49 -0500
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Impeller Damn...
From:
cnc-list@cnc-list.com
CC: muckl...@gmail.com
You can use the shop-vac to blow out the system too...or a garden
hose.
On May 17, 2015 4:51 PM, "Gary Nylander via CnC-List"
<cnc-list@cnc-list.com>
wrote:
I agree with the comments which Rick made. I had intermittent cooling
problems on my Yanmar 2QM15 for a number of years - most of the time when
it had been run for a while, then stopped, then started again. The
whistle was annoying...
I then had more serious problems, and found the impeller had come
apart. I took all the little pieces of the busted impeller and assembled
them with glue and tape to make sure there was nothing still in the
engine. OK. With a new impeller it went back to overheating every so
often like it used to do.
I started again - I ran the engine each time I changed anything...
After checking the hoses, strainer, pump, more hoses, and replacing the
zincs, I found not much water coming through the hose leading to the zinc
at the forward part of the engine. Confusing. When I pulled the hose
going to the zinc area and fired the engine, I found a piece of an
impeller which was hard as a rock and coated in rust stuck in there. The
impeller I had just pulled was recent, no rust and not hard. All the
other impellers I have changed in 20+ years of ownership had been whole.
The only thing I can think of is that piece must have been in there
for years - - - and only caused problems in certain conditions. Once it
was removed, I have had no cooling problems for the last year!
Start at one end, and follow it through. Blow out everything as you
go.
Gary Nylander
30-1 Maryland
----- Original Message -----
From: Rick Rohwer via
CnC-List
To:
cnc-list@cnc-list.com
Cc: Rick Rohwer
Sent: Sunday, May 17, 2015 12:44 PM
Subject: Re: Stus-List Impeller Damn...
Hi David,
i’ll chime in and hope it helps.
If you are lucky, the vane was torn to tiny particles and pushed all
the way through the cooling system and you are free as rain!
If you are like me, it is lurking somewhere in the system between the
pump and the exhaust outlet and pretty much the same size as when it
left. In a raw water cooled application, that means it could be
anywhere in the cooling system of your engine block, potentially blocking
or contributing to future blockage. In a fresh water cooling system
I think the chunks end up in the heat exchanger or where the raw water is
introduced to the exhaust gases.
Just as a suggestion, try not to run the engine, and starting at the
pump, work your way up line carefully checking for pieces in the hoses
hoping that it lodged in that line prior to entering the block.
Hang on to any chunks you find so you can get an idea of how pulverized
it is. After that point i doubt that there is much chance you would
find it. i don’t know that there is much you can do after that
except watch temps and signs of overheating. Maybe the new fully
functioning impeller will push it out over time.
I like to “lay hands” on my diesel occasionally! I had a hot
tub that would heal itself on occasion after a brief group hug!
Good luck,
Rick
C&C 37+ Paikea
Poulsbo, WA
On May 17, 2015, at 6:01 AM, David via CnC-List
<cnc-list@cnc-list.com>
wrote:
A first time. Found a missing impeller vane on my 3QM30.
The whole damn vane. Suggestions before I start tearing the
who damned cooling system apart? Its a raw water cooled
engine with a Sen-Dur retro-fit.
Thanks in advance.
David F. Risch
C & C 40-2
(401) 419-4650 (cell)
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