Difference

[Rranger]

I have a1993 Yamaha T9.9elrr kicker on my 1976 slickcraft 22’ boat. It had a 11.75 by 9.25 prop on it. Is a 12 by 9.25 be much difference? . Never run it all out 97% of the time just trolling. If the motor has to work a little harder to troll that would be fine.

 

[airshot]

Dia is not as critical as pitch...you should be fine.

 

[jimmbo]

Since we aren't able to examine the 2 Props to see any Differences in Blade Design(Shape and Area), Cup and Rake, even Blade Thickness, a firm Answer is not really Possible. Props of different Brands, or Models, throw all kinds of Curves to the Answer, even if they have the Same Dia, and Pitch...