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What is your total HP of both engines? My 440AC is a total of 750hp and planes at 1700rpms. I cruise at 2300rpms at 20 knots. If you have gas engines, you need to be at 3200rpms for cruising speed. BUT!!!.... i dont know what props you are running... if they are stock, then gas engines run at...

Yes.... seems like there are not many of us using sites. I have a 1989 SeaRay 440AC with Cat 3208TAs Glad to be here!