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I’ll preface this with this factoid- I just installed a new engine temp gage and have ran my engine several times since. So I start my engine and let it run on idle anywhere from 5-15 minutes before we leave the dock. The slow ride out of the marina to the lake takes 20 minutes. By the time I get out to the lake my engine temps are at 200-205. Once I’m out in the lake I tend to motor another 10 minutes or so before I hoist sail. Within those 10 minutes of lake motoring, my temps drop to 150-160 and stay there as long as I have the engine running. Am I witnessing the thermostat opening up, allowing the temp to drop? I have the old brass geared, high pressure pump, maybe it’s pumping more water with when I throttle the engine up when out of the marina....of course, I have to slow down my engine speed when I enter the marina and make the 20 minute ride back to the dock and I notice no rise in engine temp.
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Last edited by pearsontriton28; 07-14-2019, 09:06 PM. -
your initial temperatures are too high
I would check for a restriction in the cooling circuit
What is the condition of the tee in the water jacket plate and the thermostat housing? -
Everything seems to look fine externally. God only know what it looks inside. I haven’t flushed it out or changed the thermostat. Early this season, I sucked ip some debris, shearing a key in my pump. I replaced the keyway and now I have water out the exhaust again. I wonder if I have some debris trapped somewhere causing it to heat up for the moment.Originally posted by nyvoyager View PostComment
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First thing I'd try is removing the thermostat. If that doesn't bring the temps down, we can suggest further diagnosis. I've seen cases where a load of crud collects just below the thermostat.Comment
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What Al said and a thermostat can get sticky too, albeit rare. Look for some debris under the "exit fitting" on the manifold, this is a common collection point too.
Dave Neptune
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