Im not an expert, but from out of what ive read on these forums, i think your engine is not properly aligned and therefore you're having trouble with the thru hull seal. As for the exhaust overheating, maybe you clogged it? Again im not an expert, but thats just the first thing i could think of. Another thought i just got, maybe the hose that supplies water to cool the exhaust is damaged or has come loos. That would explain the overheating and why you had water entering the hull
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