Re: my 14ft 1988 bayliner capri w/50 force motor is not as fast
Is that speed from your boat speedometer or a GPS? The boat speedometers typically aren't very accurate, so most recommend using a GPS to verify the speed.
What RPM is your motor at and what prop do you have on? We're looking for diameter and pitch. If you don't know the prop information you might have to look at the prop to try to find a stamp that states as much, or the manufacturer and model number. The Prop will typically be stamped with something like 14 13, which means 14" diameter, 13 pitch.