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Old 11-07-2022, 03:49 PM
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Quote:
Originally Posted by yeahmag View Post
I'm not certain this is a problem, but for the first 20-30 minutes of cruising, the temp gauge swings back and forth from 170F-200F. This is a RWC engine with a Moyer thermostat in it. After extend cruising time, it settles in right around 180F.

My suspicion is the thermostat is opening and closing while then engine itself is still getting up to a consistent thermostat, but I wanted to get some other options.

Thanks

-Aaron
My previous engine would do that, it eventually got to going past 240
The long-term cure was another engine, but the short term cure was a good acid flush.
Best case is clearing salt, algae, dead fish, and so on will put her back to normal. Worst case is there is enough corrosion and rust that metal bits will keep getting loose and causing problems.
The other possibility is the thermostat has gone nuts, a quick test is to remove it and use a bypass valve.
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