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34mainship pilot cavitation Thanks Leonard I think the next time I pull the boat i will try the fairing. There has got to be a solution with as many of these boats that was built. Can’t believe people are just living with the noise.

34 Mainship pilot cavitation Thanks Comodave for info. Marine people and prop guy said clearance is O K. Also strut bearing and motor mounts good. Through about the fairing and it makes since with water running aside the keel then at the end of the keel a flat end. If that’s the problem l need...

34 Mainship cavitation The prop is a 25 x 28 . Distance from prop tip to Hull is 4 1/4 “. Prop had a cup of 2, changed to a cup of 4 made worst, changed again to no cup and did not help. Doug

Thanks David for the feedback. With as many of these boats that were built surly somebody has come up with a solution Doug

Recently purchased a 34’ main ship pilot 2001 w/ Yanmar 350 hp that has cavitation/ventilation around 1800 rpms and above that is intermittence. Took boat to reputable boat yard 70 plus years and was told it was the prop. Had prop redone and balanced and it helped a little so removed prop again...