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Have a js550 I just finished swapping a 650 engine into. Ski fired right up and sounded great. Upon inspecting it I noticed fuel leaking from the bottom of the carb where it meets the intake manifold. Installed a new gasket and changed nothing. Carb is the stock Keihin cdk. Any help would be...

Forgot to mention I put brand new plugs in it no difference. Checked the exhaust system for leaks and restrictions was all good. The choke was replaced with a primer. Even if the ski runs great on the hose and revs out, will it act different in the water if the carb needs to be rebuilt?

I have a sn 701 superjet 61x engine. The ski has 150 psi compression in both holes, starts right up and revs with no hesitation. I took the ski out for the first ride the other day and it is anemically slow and does not get out of the water for anything. It seems almost like it’s running on one...