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    1995 ProV 150 max RPM 3600

    I can't seem to get my yamaha 150 above 3600 RPM. I've check timing , throttle linkage, fuel filter fuel water separater filter both change new. New plugs. Boat idles fine, jump up on plane great. Just stops climbing in RMP at 3600. Even switched props from a 19 to a 17 and only lost top end...
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