Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: prop size ?

Posted by Metalman111 on 04/29/19 - 7:18 AM
#1
1985 , SS 15' ,2001 mercury 40 2 stroke ,carb .

the engine came off a pontoon boat so i know i have to move down in size.
it has a 12.25 X 9P on it now

i want to use it on lake michigan and other smaller lakes, rarely towing, mostly fishing and speed

thanks hope to get some good info.

best i can figure something around a 10 X 16P

Posted by Phil T on 04/29/19 - 8:11 AM
#2
A pontoon and a 15' are completely different boats and have vastly different prop requirements.

Recommendations by owners with the same model with a Mercury 40hp advise trying these specific model/size:

Mercury Black Max 14"
Yamaha Painted SS 14"


Posted by Metalman111 on 05/15/19 - 12:13 PM
#3
thanks phil t

Posted by Finnegan on 05/16/19 - 9:28 AM
#4
If you're looking for the lower cost of aluminum, the best prop for the engine is a Mercury Spitfire 4 blade, also sold as a Quicksilver Nemesis for a few bucks less.

https://www.mercurymarine.com/en/us/p.../spitfire/

For the very best performance and top speed, and more money, get the SS Trophy Sport.

https://www.mercurymarine.com/en/us/p...phy-sport/

Go to the Mercury Prop selector section for correct pitch.