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 > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > -- Joel 301 541 8551
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