[AC2717]

Originally Posted by Formula260SS

You could try using this prop sizing calculator, worked perfectly for my Pontoon Barge. Just make sure your not over revving the motor at WOT

https://www.miwheel.com/outboard-pro...zing-analysis/

Or my favorite - bolt more power on the back

I wish on the power end , but she is not of license age yet (1.5 years away).

I have used some of those selector sites and they show 9-11 pitch. on the link you provided (thank you very much) it shows 10.5-12. it seems its all over the place.

I have read that that lower-horsepower engines can bog down if fitted with an outboard propeller with too high a pitch and diameter, and that can wear heavily on internal engine parts.