Hey folks, I'm experience this same problem. I have a carb Assault 310 engine. Everything is fine at first, then after I take off the first time, when I back off Rims stay at 1800 in neutral and 1200 when I engage clutch.

Makes trailering and pulling into a slip a pain. It's an 01 Moomba Mobius I just got the boat a few weeks ago. This is my first ski/wake boat, so I'm not familiar with all the details of them yet.

When you say spray for a vacuum leak where and what am I spraying?

Thanks for the help and advice everyone.

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