what size prop do i need for my boat

[rileychad]

I have a 1967 sears runabout boat and it is rated for a 45 hp I currently have a 50 hp evinrude sizzler 1974 model it came off a pontoon boat and runs great but I think its a little heavy for the boat but im not sure
any help would be helpful
thanks
cr

 

[Mi duckdown]

Re: what size prop do i need for my boat

Don't know for sure. But it looks like you have long shaft motor on a short shaft transom.

 

[SilverSS07]

Re: what size prop do i need for my boat

Don't know for sure. But it looks like you have long shaft motor on a short shaft transom.

+1. Looks like it needs to be moved up a lot. Do you have a tach? If so what is you're RPM @ WOT? What pitch prop is on the boat now? If it's the prop off the pontoon boat you probably need to go higher on the pitch.

 

[jestor68]

Re: what size prop do i need for my boat

How big is that boat?

Pull off the prop and read the size maybe stamped on the prop hub.

 

[Mi duckdown]

Re: what size prop do i need for my boat

Doesn't matter. if motor and transom are incorrect.