I have a 21' pathfinder bay boat with a 150 Yamaha. Someone stole my prop! Any ideas of what pitch prop I should buy to replace it? All I know is that it was a four blade . Any help on selection would be great as I have no idea on pitch selection.
Thanks

jeez, that blows. I would call a dealership and ask them what they are putting on similar rigs. there is also a pretty good prop finder on mercury's website. it can determine the pitch of your prop based on math

https://www.mercurymarine.com/en/us/propellers/selector/#/step-one

Youll probably need something like a 15 to 15.5 in diameter offshore style prop in a 19 or 21 pitch depending on how heavy that boat is. You probably dont have to have a 4 blade. The powertech ofs is a good wheel for those bay boats.

Josh,
On that CC, it's all about carrying a load and blasting out of the hole in the least amount of time and bow rise you can get.

Powertech offshore 4 blade with large vents in probably a 18 or 19 should be the ticket.

Pretty much what I was getting at. A 19 big diameter offshore wide blade with that low gear will be the ticket.