Raw Water Impeller Replacement

🛠 Tools & Materials Needed

Step-by-Step Instructions

1. 1

   Close the raw water seacock before starting any work.

2. 2

   Locate the raw water pump, usually mounted on the engine block.

3. 3

   Place a rag and bucket under the pump to catch residual water.

4. 4

   Remove the pump cover plate screws; note the number and position.

5. 5

   Lift off the cover plate carefully and inspect the O-ring or gasket.

6. 6

   Use impeller puller tool or two screwdrivers to gently pry out the old impeller.

7. 7

   Inspect the pump housing and cover plate for scoring or wear.

8. 8

   Apply petroleum jelly to the new impeller vanes and housing.

9. 9

   Install new impeller with vanes bent in the correct rotation direction.

10. 10

    Reinstall cover with new O-ring/gasket, open seacock, run engine briefly and check for leaks.