
03-31-2008
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SaltwaterSuzi/CapnLarry
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Join Date: Apr 2005
Location: Permanent Vacation
Posts: 526
Rep Power: 8
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Quote:
Nifty trick thanks for passing it on. For the amount of time it would take to do that I would probably just put in a new impeller. Using heat for a diagnostic tool makes sense though.
Don't most people who haul their boats during the winter replace the impeller as part of re-commissioning in the spring?
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Some do, some don't. The axiom "If it ain't broke, don't fix it." may hold some sway here.
If you can change your impeller faster than you can heat up the housing, more power to you. For many of us, just getting to the cussed thing is a challenge. A friend of mine, currently cruising in the Bahamas, e-mailed me for advice on changing his on his Yanmar. I put it to our expert mechanics, one of whom had worked on his boat - he said you had to remove an engine shoe (foot? what ever you call them thar thangs) to get to the back of it - or remove the entire pump. Fahgedaboudit! On my previous engine - a Perkins 4-108 we dubbed dieselbub - I changed the impeller once in about six years. I inspected it frequently, well, once a year or so, but didn't change it if it looked okay.
In any case, I'm not a mechanic. Engines have been known to cringe and back away when I approach with so much as a screwdriver (or a Bloody Mary). SO take my personal advice with a grain, nay, a block of salt. But when I relay info from the pro's, well, listen, I have great respect for these guys.
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Saltwater Suzi and Cap'n Larry
"A sailboat is a fickle mistress. You’ve got to buy her things. You’ve got to understand everything about her. What you don’t know she’ll use against you." -Captain Larry
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