2004 yamaha f115 prop question.

[outback32]

I have a 04 f115 on 22x72 express vx22 mod v. I just bought the boat 2 months ago. Ive noticed im only getting 5200 rpm. The prop on the engine is a Michigan wheel vortex prop 12.75 x 21. It came with another prop. Its a 13.75 x15 quicksilver prop. Looking for recommendations on which prop to try next. And wondering if either of these props are correct for my engine.

 

[Wisconsin Mitch]

According to ChatGPT the oem is a 13 1/4 x 17rh.