Have a Max Prop and it has worked great for 16 seasons. As long as you clean the exterior, watch your zincs, and grease it annually it will work flawlessly. It may take a few tries to get the pitch right. With the pitch too aggressive you will not be able to reach full engine speed. Too soft and you will not reach full boat speed. Trial and error works well here. Do not believe manufacturer's claims that these props reduce prop walk. If your prop shaft is not close to level you will have prop walk with all propellers. Follow assembly instructions carefully as it is a bit complicated. Lastly, I would not attempt to change a pitch adjustment under water.