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I have read many of the posts on overheating. Last winter the Intake manifold froze as I did not drain it ever, now I know it does not drain completely with the engine drains. I have changed the exhaust manifolds and intake manifold this year. I changed the raw water pump a few years ago when it...
Started having overheating problems over 3000 rpm last season. I have changed the impeller, old one was intact. I removed and cleaned the manifolds and risers, some rust. Checked the timing, OK. Runs in fresh water. Running on muffs today at idle I found that the starboard riser was hot 115f and...
