Older 225 hp Yami on 80's vintage Sceptre

[bumpdraft]

I tried that calculator on the numbers I remember on the old motor (mind you that was over 12 years ago) and I get 19% slip on both props. I could not find a place to plug in the weight of the boat,load, type of hull, etc.

That same prop, a saltwater series 17 on an f225, same boat, gear ratio of 2 has 12% slip, per calculator.