Prop size for 16x52 jon boat?

[doehunter]

My 40 hp 2 stroke Yamaha came with a really beat up prop so I need a new one before I use it.
It had been on a pontoon boat so I'm guessing I would want a different pitch.
My jon boat is 16 ft, 52" at the bottom 72" at the top. It will be decked out like a bass boat.
I see a lot written about sizing props but it all entails buying them and experimenting to get the peak rpm.
I would think enough guys have already done all of that and most would end up with similar props, Soooooooooo?
any suggestions?
Jim

[boats.net]

Look through Yamaha's performance bulletins to see can find a boat/motor package similar to yours, Performance Bulletins | Yamaha Outboards

[doehunter]

Look through Yamaha's performance bulletins to see can find a boat/motor package similar to yours, Performance Bulletins | Yamaha Outboards

Nope,
The closest they got were heavier boats with 50hp motors.
Both used props with a 12 pitch.
So I'm guessing i need more pitch than that but I don't know how much.
No other jon boaters here?
Here's a pic of the boat with the deck and old motor, no deck and the new motor.
I haven't made up my mind if I'm going to put the deck back on, or just put in a floor and a center console.
In any case I don't think it'll be a 1000 lbs wet. The boat is about 400 lbs by itself without the add ons.