I agree with Fred that a re-power is a very expensive solution to a
relatively minor problem.  The impeller and mixing elbow would be my first
2 suspects.

Wally did a re-power and a windlass:
http://www.wbryant.com/StellaBoat/projlist.htm

Joel
35/3
3GM30F
Annapolis



On Thu, Apr 10, 2014 at 3:01 PM, Frederick G Street <f...@postaudio.net>wrote:

> Frank -- just so I understand: your 3QM is overheating?  Does the engine
> run well otherwise?  Before you go to all the trouble and expense of
> re-powering, find a really good diesel guy to look at your engine.
>
> I had a great guy do some work on my 3QM a few years back, and he told me
> the engines were originally built for hard, continuous use (industrial
> compressors and the like), and if properly maintained, they should last a
> *very* long time in a sailboat.
>
> I did find an issue with mine overheating a couple of seasons back.
>  Because the fresh water heat exchanger is mounted to the engine at an
> angle, you can check the fluid level when the engine is off, and it will
> appear that the coolant level is fine.  But with the engine running (and
> cool, so you don't get burned), pull the fill cap and you'll see that the
> system needs more coolant; it settles to the bottom end of the heat
> exchanger where the cap is when the pump isn't running.  You can also see
> if there's much coolant running with the cap off.
>
> Other possible things to do: check the coolant pump impeller; rod out the
> passages in the heat exchanger; make sure you've got plenty of raw (sea)
> water running through; check the exhaust mixing elbow for build-up.
>
> And I'm sure other listers will add to this.
>
> Fred Street -- Minneapolis
> S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI   :^(
>
> On Apr 10, 2014, at 1:14 PM, Frank Woronkowicz <fworonkow...@gmail.com>
> wrote:
>
> My boat has Yanmar 3QM30 with original added fresh water circ. jabsco pump
> and Sunrod HEx. overheating on the Chesapeake Bay. I think to replace
> engine  and propeller. Please let me know if any LF owner already did this
> work and what is approx cost.
> The second question is windllas  type and installation. Did anybody
> install windlass in anchor compartment?
> I have her for approx. 20 years and finally these should be done,
> Thanks
> Frank Woronkowicz
> LF 38 s/y Gdynia
> ANNAPOLIS MD
> fworonkow...@gmail.com
>
>
>
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-- 
Joel
301 541 8551
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