RE PROP TOHATSU 20 EFI

[planoron]

Just got a deal on a used Tohatsu 20hp that will hang on a WM 350 rib. Prop had a few dings so I will keep it as a spare but looking at a new one for best all around. Leaning toward the 3 blade 9.25x11p but interested in real world opinions.

Thanks in advance

 

[sail sfbay]

Good plan. My understanding is the higher pitch prop will increase your top-end speed but reduce your acceleration, i.e., hole-shot. Below is Tohatsu 20hp prop selection guide. As a former water skier I replaced my stock prop with one that gave be better hole-shot.

 

[sail sfbay]

You might find post #16's performance with a 9.25x11p heplful.

Stainless prop in a 20hp tohatsu

I've got a salt Marsh 14 with a tohatsu 20hp. I'm hitting the rev limiter and need to go up in pitch. My question is will I get much difference with a stainless prop on a small motor like a 20hp. Tohatsu says no but a couple of local techs said yes. I called powertech and they couldn't give...

www.microskiff.com

 

[Benny17441]

Only one right prop size for a boat/engine combo. The right prop size is the one you can find that allow the engine to reach the closest to its maximum rated RPM without exceeding it. The only proven system is to try a few but not a service provided by most prop retailers. Determine the size of the prop you have and how does it allow the engine to rev at WOT, if it is short a few hundred RPM get one with a lower pitch but if it is reaching maximum RPM and wanting to still go then go the a higher pitch. Remember loads will affect top RPM. Best to prop for light loads.