How to Take a Water Pump off a Johnson Outboard Motor

You can take the water pump off a Johnson outboard motor in just a few minutes with a socket wrench. The Johnson outboard motor is very similar in design to most other outboard motors, with the water pump attached to the top of the gear box. You should remove the water pump to inspect the impeller inside the pump housing at least once a year, depending on how often you run the motor.

Things You'll Need

• Socket wrench set

Instructions

1. Remove the nuts from underneath the top lip of the gear box with a socket wrench.

2. Slide the gear box off the engine housing and set it down on a flat surface.

3. Unfasten the bolts on the top of the water pump housing that secures the pump housing to the gear box with a socket wrench.

4. Lift the water pump housing over the motor shaft and take the pump housing off of the motor.

Tips & Warnings

• Never attempt to take the water pump off of an outboard motor while the engine is running.

References

• YouTube: How to Replace a Water Pump on a Mercury 150 Outboard
• Boat Trader: Repairing your Outboard Motor Water Pump
• Stern Drive: Johnson/Evinrude Outboard Diagram