When you are checking your boat over before heading out, don’t overlook the propeller.
Check the propeller as part of your pre-launch routine. Use a deep well socket to remove the propeller several times during the season to make sure discarded fishing line hasn't become wrapped around the propeller shaft.
While you have the propeller off, inspect it for nicks, dents and other signs of damage. The smallest dent can cause your boat to lose performance and burn excessive fuel. A damaged prop also can vibrate, putting too much stress on bearings and seals causing additional damage.
Apply a liberal amount of waterproof grease on the propeller shaft to prevent corrosion from getting it stuck in place. Re-install the propeller and hardware in the same order that you took them off. Tightening the nut snugly and secure the locking tabs against the nut so it can’t back off the shaft threads.