I never really get on top of the water. Runs fine up to about 10mph, then if I push further on the throttle, the engine shuts down. If I pull back on the throttle quick enough, it does not die. Back to 10mph. This motor has had a fuel pump conversion installed on it. No pressure needed in fuel tank. Indicator at motor has (slow, start, fast) as the throttle cable goes more forward this indicator moves more toward fast. It gets almost to fast when I get to 10mph.