Boat prop

[jofa928]

"Hi,

I have to replace the

"Hi,

I have to replace the OEM prop on my 40hp 1990 Mercury 4 cyl/2stroke.
It had a 10 1/4 x 14 3 blade , will I be OK using a 10 1/4 x 14 3 blade cupped prop on it ?"

 

[galamb]

"Joe, simply going to a cupped

"Joe, simply going to a cupped blade will maybe only shave 50-100 rpm off your WOT.

That prop, given your "additional info" numbers that you posted, should work excellent for you - sounds like you are "perfectly matched".

The only difference you may notice, and it's a good difference, is that it holds speed a little better in a tight turn (cupping helps prevent cavitation in curves - as well as providing a "better bite" on the water overall)..."

 

[jofa928]

Thanks Graham !

Thanks Graham !