How to Change the Outboard Motor Water Pump for a Sea Ray

Many experts agree that the water pump on an outboard motor should be changed annually. This shouldn't be a difficult task if you have some mechanical ability; only a few tools will be needed. The water pumps location should be between the upper engine housing and the gear case.

Things you'll need:

• Socket Wrenches


• Gloves


• Towels


• Marine Grease

1. Remove the gear case; you'll probably need a set of socket wrenches. Put the gear case somewhere so you can work on it easily. Most people have a workbench that is well lit. Some people choose to put the case in a vise to help stabilize it. 


2. Remove the water pump housing from the gear case. You'll probably need socket wrenches for this as well.


3. Remove the metal plate and rubber gasket from the gear case. This might be a dirty process so you should consider wearing gloves. 


4. Clean the gear case with towels. There will probably some oil residue lying in the bottom.


5. Remove the water valve from the old pump housing and install it on the new water pump housing. 


6. Install the new metal plate and rubber gasket. 


7. Grease the motor shaft, gear case and new water pump housing.


8. Install the new O-ring on the pump housing. You should be able to do this with your hands. 


9. Attach the water pump housing to the gear case.


10. Attach the new gear case to the motor with the same wrenches and nuts you used to take the old gear case off.


11. Test your engine to make sure the water pump works. If it doesn't, immediately shut it off. Inspect every part to make sure you properly put them together.