Originally Posted by ScottyG24
Is prop aluminum and when u remove it isthe area where the prop shaft goes into the prop rubber? When props get old that rubber breakdown abd it will cause it to slip reducing thrust. If it is not that you are prob just incorrectly pitched. See what the pitch number should be for your propellor beforeyoubuya replacenent. Plastic props are fine and the flex is built in but they dont last forever
I can only speak from my own experience. I had a Honda 2HP, with the stock plastic prop, for 28 years, put many, many hours on it, broke a number of shear pins on rocky river bottoms. Maintenance consisted of smoothing off the rough edges with a file. Absolutely no problems with the prop, or the motor. Other plastic props may vary?