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Ted G.
Ted G., Rigger, Diagnostician
Category: Boat
Satisfied Customers: 6117
Experience:  40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness
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I have a 15 horse mercury two-stroke experiencing cavitation

Customer Question

I have a 15 horse mercury two-stroke experiencing cavitation just about when it's going to plane have check for Spohn of without any issue could this be internal to the lower unit
Submitted: 1 year ago.
Category: Boat
Expert:  Ted G. replied 1 year ago.

Hi, it really can't be a lower unit issue. Small outboards like that have basically a direct connection when the gears are engaged. So either the hub in the prop is spinning or the prop itself is cavitating and loosing it's grip on the water. Is it possible to lower the engine any more on the transom? That will help if it's a cavitation issue.

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