Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: Prop Recommendation 1989 Yamaha 50 on 1963 13' Sport

Posted by Phil T on 07/14/17 - 1:29 PM
#3

At sea level the recommendation for owners are a 10-1/4" x 15" stainless Yamaha prop.

With a load, I would drop down to the same make/model but in a 10.25 x 13 size.

Given you are at elevation, you will suffer a loss of hp. I would go for a 11" pitch.

Mounting should be two holes up.
http://www.whalercentral.com/articles...cle_id=106

Get a tach.