23 cc inboard prop size question

[MarkR]

The reason for the cupped edges is it helps reduce the noise generatoed in that tunnel.

[Highway12]

Thanks The cup also adds pitch which should put my RPMs right where they should be. I was testing a 16 x 16 yesterday and blew the raw water pump impeller so I never got to full RPM to tell if it was correct or not.

[Highway12]

Anyone know what prop to start with?

[aldo]

I'm running a 16x15 cupped as well on my 350/260hp inboard with throttle body injection.
I experimented with quite a few others but get the best numbers with it.

[Highway12]

Does anyone have a recommendation on motor mounts?