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i have installed twin yamahas 300hp hpdi engines on a 10 mtr crompton. the port engine overheats when engines are trimmed, if not trimmed the revs drop after a few minutes at full throttle. can anyone help? thanks
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has the motor always done this, are they new to you or did it just happen once.
if the impellers are over a year old, I would change them out. -
engines are new to me. this particular engine had only run for two hours before they came to me. i have already changed the impellers. the engines are fitted 63cm apart from the centre of the props. yes this engine has always done this since i have it. when not trimmed it does not over heat, but revs fall after a few minutes at full throttle. thanx.
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DO you have any obstructions near the overheating motor??
sounds like you are losing your water flow over water ports, if only happening when trimmed up. you can TRY lowering motors a hole.
personally...i change out thermostats every year, along with waterpumps and prv parts. if im 4 hours from home,i dont want a 50 dollar item screwing up my weekend. i would suggest doing them all and repost your findings.Comment
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