Disassembling And Inspecting The Sea Water Pump - Westerbeke 9.0 BCG Technical Manual

Disassembling and Inspecting the Sea Water Pump
When disassembling the sea water pump for inspection, an impeller kit (part # 032620) should be purchased
so the impeller can be replaced along with a new gasket at the time of inspection as needed. Although the
impeller is a small part, it plays an important role in the proper operation of the engine. Replacing the im-
peller at the time ofthe sea water pump's inspection can only improve the sea water pump's pumping ability.
In addition, a new impeller is accompanied with a new gasket, an item that is needed to assemble the sea
water pump. See the note below.
1. To disassemble the sea water pump, remove the four cover screws.
2. Remove the cover and the gasket.
3. Remove the rubber impeller and the wear plate.
4. Remove the rubber a-ring.
5. Remove the cam screw and washer and the cam.
Now the sea water pump is stripped far enough to be inspected.
Inspect the sea water pump by rotating the pump's drive shaft. If it excessive play exists in it, or if it sound
rough or is frozen, replace the entire pump.
Since rebuilding a damaged or worn pump from individually purchased pieces would almost match the price
of a new pump, we recommend that an new pump be purchased instead of rebuilding one.
NOTE: When reassembling the sea water pump with a new impeller kit, wipe a little petroleum
jelly around the impeller. This ensures that when the engine is started the impeller will not run
dry until sea water reaches the impeller as it draws a prime.
Westerbeke Generators
116