 Check out the bookstore at IRBS.com |
|
|
|
|||||
|
||||||
From: Jim Sims (no email)
Date: Wed Jan 05 2005 - 19:50:04 EST
I have a 1973 Gulfstar 41' ketch sailboat with a Perkins 4-108. It is
overheating at medium or higher rpm. The engine was rebuilt
(allegedly)about a year ago, just before i bought it. It was not really
used last year [due to boat repairs keeping it dockside] except being
turned over at the dock ~monthly.
I removed the raw water thruhull and it has great flow. I removed and
cleaned the raw water strainer (not even slightly clogged). I removed the
raw water to exhaust hole and back-flushed all the way through the raw
water strainer (last item before the thruhull - flow is great. I removed
the raw water impeller cover and it seems fine though it has shed one
rubber? 'tooth' - i will be replacing it.
I opened the end of the heat exchanger (and located that missing impeller
vane) - it didnt seem to have scale in there, but i didnt see any
(obvious) sacrificial zincs.
I suspect the thermostat has just enough scale to keep it closed, but cant
locate it on this engine (though i found the one on my neighbor's 4-254
easily). Can you tell me where the thermostat is located? And those
sacrifical zincs?
thanks!
jim
living aboard Nekkid Joy
1973 GS 41
lying Charleston, SC - relocating to Melbourne, FL
www.nekkidjoy.com
___________________________________________________________________________
|| The Live-Aboard List : send a "subscribe" or "unsubscribe" request ||
|| in body of message to: ||
|