Replacing Your MerCruiser Water Pump

1) Drop the gearcase to access the water pump housing. This requires removing the mounting bolts.

2) Locate the bolt under the trim tab. Mark its position to make reassembly go easier.

3) Using a fitting socket on the four mounting bolts, remove the water pump assembly.

4) Lay out every pump component by removing the old housing pump and impeller.

5) If the impeller vanes are no longer straight, replace the impeller.

6) Be sure to use sealant on the gaskets to reduce leaks.

7) Push new impeller into the housing liner twisting slightly clockwise.

8) Place impeller key flat on the driveshaft, then lower the housing and impeller assembly into place.

9) Be sure not to overtighten mounting screws.

Mer Cruiser Alpha 1 water pump kits
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