Re: Replacing My Propeller Help
There are not too many choices for that engine. 278-10 would indicate a 10 inch pitch. If it is working well for you, go with the same pitch.
Why do you want to replace the prop? lots of nicks? Damage? Sometimes it is easier and cheaper to repair a prop.
I am not familiar with the pontoon props for that engine but typically the props are listed as 10 3/8 diameter X pitch. HOWEVER: Sometimes as pitch gets lower, as for a 'toon application, diameter may go up . SO you may see props listed as 10 1/2 X 10. Do not worry about small increases in diameter.