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Go Back   SailNet Community > On Board > Gear & Maintenance > cranky inboard
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Topic Review (Newest First)
09-08-2003 05:33 AM
RichH
cranky inboard

When was the last time that you re-torqued the cylinder head? Should be done yearly! Your symptoms are characteristic of a blown head gasket. Do a compression check with a gauge when cold and again after the engine comes up to operating temperature.
When the engine is cold the head bolt/studs are thermally shortened. When at operating temperature there is elongation (stretch) and you lose the ''clamping pressure" of the head. Proper torque applied gives preload tension to the head bolts.

Second possibility is a slightly sticking exhaust valve stem. Just get inside and manually push the exhaust valve up and down a few times to be sure that the valve stem isnt binding. If it is, spray on "PB Blaster" and work it until its free .... then look for a pin hole in the wet exhaust manifold that is leaking back into the combustion chamber when you shut down the engine. If there has been water back-flowing into the combustion chamber, get some "Marvel Mystery Oil", pour some into the sparkplug hole and soak the piston rings free. Use 3/4 regular motor oil and 1/4 MMO when you fill the crankcase thereafter.
09-08-2003 03:26 AM
maestro
cranky inboard

alright, before I ask I know that the best thing to do is use this old inboard as a mooring BUT in liew of this....

I have a 1965 Palmer 1 cylinder gas inboard on an Islander Bahama 24. The motor starts fine and it idles fine too. When I throw it into foward, I lose 1/2 the power and after a few minutes, it dies. I can start it back up and go through the cycle again. Few more minutes and it dies again. I have put on new spark plug, cleaned the fuel line, added carb cleaner.... is there anything else I can try to get this old baby to work a little better.

Thanks....

 
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