Quote:
Originally Posted by Sailingbluew
Impeller was causing some of the issue. It was missing 2 Pieces, I changed it 4 months ago. ... The new impeller is the wrong kind and I replaced it with the old with one missing piece. Still overheating at 2000 rpm
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So old impellor is munted so not a great solution to reuse it, better than nothing I guess. There may be bits of impellor stuck in the engine causing a partial blockage.
Whether the engine was damaged by overheating will depend upon how long it ran for before you recognised that it was, and, whether you shut it down or the engine shut down (seized).
Will it turn over? I mean if you hit the starter is it freely turning? If so that's a very good thing. If it doesn't your in for a great deal of wallet and time pain.
Hot water (boat) mufflers are designed to fail (melt basically) if there's too much build up of heat through them because the temperature of exhaust gas increases as engine temperature increases. Usually the neck where the exhaust outlet is clamped to the
muffler melts.
This is a good thing because it quickly causes exhaust gas to fill your engine bay and
boat. Somewhat looks like a fire has broken out. The good thing is that the design temperature of the
muffler failure is hopefully less than most engines will seize at. And so this tends to save engines if it is quickly recognised and turned off.
In summary you will likely also need a new water muffler.
If your engine is starting, and you've filled it with fluid or water and oil too, then if you
really really need to, ok you can turn it on for berthing. Your
safety over your
money. But here's your chance to learn to sail in to a berth. It's a good skill to develop and practice.