115 Yamaha on a 24' pontoon

[Puryear River Rat]

I just got a 2012 Bennington 24sl with a 115 Yamaha on it. The prop I think is a 13something X 15something. It will max rpm to 7000. I think that's a little high and want to be between 5000 and 6000. Does anyone know what prop size I should get or what do you use on your boat. thanks in advance!!!

 

[H2GO]

I have a 2017 24 foot with 115 Yamaha and I use a 13.5 x 14 prop. Max rpm is 5700. I think you have a lot of slippage. Might be mounted too high? Mine is using the top holes for mounting.

 

[cwag911]

You might want to check the prop hub and make sure it is ok. Put the motor in gear (NOT RUNNING) and see if you can turn the prop.

 

[Puryear River Rat]

I think you guys might be right on the slippage. Pretty sure it is a 13.5x14 thats on it. Seemed a little funny at times. I'll check it and see what up with that....thanks!!!

 

[Puryear River Rat]

I put it in gear and checked and can not turn it. It's a 13.5 x 15. Should I look into another prop?????

 

[mowdoc]

My 2018 22SSRX with 115 Yamaha is doing 5400 at 31mph GPS. The prop is a Yamaha SS 14K 13 and came on the boat/motor. Everything is stock but I am planning to have prop tweeked a little to run at 5800-6000 range.

This data is on fresh water at 500 feet elevation in 100 degree heat with full gas and two people with maybe 150 lbs. of gear.