cutting the transom on an inflatable

[Nemrod]

Do not cut transom!!!! Some engines have the ability to be lowered or raised within the transom clamp. Inflatibles are bad about cavitating anyways, the light weight allows air under the hull. You need to get some weight forward so that the bottom does not act like a ram air scoop as you accelerate trapping lots of air. Tilt the engine inward a bit also.
The cavitation plate should be approximately even with or on some boats slightly higher than the lowest point. This could also be a propeller problem. Do not operate the boat at lower than required pressure--it is bad on the seams. Cutting the transom should be done only as a last resort----extremely last----I do not think this is a transom height problem. N

 

[Tasarsailor]

Nemrod is absolutely correct. It is exactly why you don't have the problem with weight in the boat. A little weight in the boat and it stays attached with the surface better therefore keeping the amount of air entrained down.

Another suggestion might be trying the automatically adjusting trim tabs. They will keep your bow down a little more and keep the air entrainment down. You will notice that you end up on a plane faster. I would add these before the cavitation plate fins.

Good luck
Tony
Portland