How long do you guys wait to replace a worn prop? Is it based on rpm? Performance? Amount worn off?

not really a certain time frame just depends how wore it really is, if you run deep water they will last a long time compared to running one in sand, you can actually wear a prop down in sand faster than you would think. rpm will increase with prop wear and speeds will decrease when prop is worn out. my longtail would only do 12mph when i first got it, by just changing the prop it picked it up big time