I have read the earlier post about changing the pitch on a prop to increase top speed. As many, I want to buy a second prop, and use it for the top speed prop. I am running a new Yamaha 115hp Four Stroke on an 18 foot boat. The current prop is an 13.25" with a 17" pitch. I know that increasing the pitch to much can be bad by dropping rpms to low at full throttle. My question is, can a person reduce the size of the prop say like from 13.25" to 13" and not have to increase the pitch as much? Or can you mess with the diameter of the prop at all?
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Starman
I have read the earlier post about changing the pitch on a prop to increase top speed. As many, I want to buy a second prop, and use it for the top speed prop. I am running a new Yamaha 115hp Four Stroke on an 18 foot boat. The current prop is an 13.25" with a 17" pitch. I know that increasing the pitch to much can be bad by dropping rpms to low at full throttle. My question is, can a person reduce the size of the prop say like from 13.25" to 13" and not have to increase the pitch as much? Or can you mess with the diameter of the prop at all?
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