Outboard / Transom Splash
At about anything greater than idle speed, I get water splashing back from the engine up the transom. At higher speeds it sprays up over the engine.
I think I've been getting some good performance from my setup after some tweaking. At first I had a big ventilation problem until I added a hydrofoil and pumped the tubes to their max. Ventilation is now mostly gone except for if there is too much weight in the front.
Before installing the hydrofoil and before the ventilation would start, I could see most of the cavitation plate when cruising. Now with the hydrofoil, it's submerged under splash and I can't see it at all. The manufacturer/seller of the boat suggested I cut the transom and drop the engine to resolve the ventilation issue which I was very reluctant to do.
My transom is 15" and my engine from the top of the transom to the top of the cavitation plate is 16.5" so it is around the 1" below the hull/transom that is recommended for inflatables.
I've watched quite a few videos where the wake looks relatively "clean" without hardly any back splash and a thin wave or splash from the prop. Mine is not clean and the wave or splash from the prop is much thicker. We've tried all different trims and at the lowest it's the best for the ventilation issue. Could my engine be too low into the water? If it is, I'm afraid that if I raise it, my ventilation problem will be worse.
We only get our boat out about once a month if I'm lucky and it's not trailered so it's difficult for me to try several different scenerios. After we get it on the water, the family is ready to go and is loosing patience for me to play around and try to tweak the performance more.