2013 Ssx 20 F70 Propeller

WIFUOP

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My sister recently purchased a 2013 SSX 20 with a F70 Yamaha. The motor tops out at 5100 rpms and the boat has a top speed of 18 mph (Empty with two passengers) The prop is a 13.5 / 13 spec.
I was wondering if that was the recommended stock prop size for that boat motor combo off the showroom floor or was the prop changed by previous owners.

Thanks
 

DejaWiz

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I checked the Yamaha Performance Bulletins and the most common props are the Dual Thrust 14x11, Pontoon Performance Series 14x9, and Aluminum Series 13.625x13.

Most test conditions were with 2 people and half a tank of fuel...top speeds range around 21-25 MPH.

I'd recommend a little less pitch (probably one of the first two out of three I listed above), since it's pegging out at only 5100 RPM.
 
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