A “Burned” Impeller (August 2006)

Impellers for the engine’s raw-water pump don’t last forever. Even if they aren’t destroyed by having been run dry following a blockage in the raw-water line, they still deteriorate over the years. If you’ve never had to change one, try installing a new one when the boat is safe on its mooring, and then go out and buy a new spare. You might be surprised by what you discover:

• Some raw-water pumps require a fresh gasket each time the impeller is changed. Do you have a gasket on hand?
• Does your screwdriver fit the machine screws that attach the cover plate?
• Might you lose a screw in the bilge? It’s so easy to do. If so, can you reach it, or should you carry a couple of spares?

All this is vital knowledge when you have to do the job heeled over in rough seas on a dark night. Tom Cunliffe

Click here to return to the Cruising Tips Archive

Archives