It is very important to use the proper pitch propeller on your 50-horsepower Mercury outboard. Too low a pitch makes it difficult to accelerate and get the boat on-plane or pull skiers, and will also cause the engine to over-rev. Too high a pitch will give great acceleration and pulling power but severely reduce speed and make it difficult to keep on-plane. Always replace a damaged propeller -- they easily become unbalanced and cause vibration that can damage the lower unit.
Things You'll Need
- Wire cutters
- Large adjustable wrench
Describe the motor type, horsepower and weight and type of boat when purchasing a new propeller, or use the same number pitch propeller as the one that came off.
Remove the cotter pin from the propeller drive shaft using wire cutters. Remove the large shaft nut using an adjustable wrench.
Remove the large washer behind the nut and pull the propeller straight off. Grease the propeller shaft prior to installing the new propeller.
Slide the propeller onto the shaft followed by the washer and nut. Tighten the shaft nut with the adjustable wrench. Insert the cotter pin and bend the ends with the wire cutters to prevent the cotter pin from coming out.
How to Remove a Mercury Propeller
Whether you're replacing a propeller on your Mercury or removing it to take it to the prop shop for a tune up,...
How to Change the Lower Unit Oil in a Mercury Outboard
Maintaining your Mercury outboard provides the peace of mind that your boat's motor will function properly when out for a day on...
50 HP Mercury Outboard Specifications
50 HP Mercury Outboard Specifications. The Mercury 50 hp outboard motor is designed for powering boats over large rivers or lakes. The...
How to Install a Water Pump in a 50 Hp Mercury Outboard Motor
Outboard motors are popular among motorboat enthusiasts because they are fuel efficient, easy to maintain and virtually problem-free. However, there are parts,...
How to Remove an Outboard Motor Cover on a Mercury
If you're doing the maintenance on your Mercury Marine outboard for the first time, you know that you have to remove the...
How to Replace the Prop Seals on a Mercury Outboard
If you see a small, thin streak of milky-colored oil coming from the bottom of the lower unit of the motor, you...