Originally Posted by mch
Not trying to step on anybodies toes but this is what I do for a living I have propped more than twenty thousand boats in the years I have been doing this.There may very well be something wrong with the motor.But until the Op can get the rpms up where they belong the boat will never perform correctly.Now that may mean two different props for different tasks.Sometimes it works out that way.I always recommend taking the boat out with your normal load and propping it for that load.On some boats a hydrofoil can be detrimental to the handling or even dangerous in a few cases.And it is always hard on the anti cavitation plates.I weld dozens up each year from the extra strain.


Here is the exact boat, it is a Package set up by Smokercraft.

http://www.smokercraft.com/showroom/fishing-boats/pro-angler/161-xl

I know this link says 90hp, but my boat says 75HP. According to Smokercraft Customer service, they changed/increased the flotation foam to get a 90HP approval in Feb 2014 mine was manufactured before that.

The Prop on this motor is a 10.38 x 12 Aluminum.

The prop calculator here
http://turningpointpropellers.com/
recommends a 12.5 x 8 for water sports and heavy loads, a 10.875 X 11 for cruising and a 10.5 X 11 Stainless.

Does this sound correct.

10.875 X 11 is only one pitch down and a half inch larger in diameter?

Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.