Last spring I made the mistake of buying a raw water pump from WM. It was in a pinch so I was just glad they had one in stock. I believe its the sierra brand. This season after 50 hrs of use the shaft snapped on me while cruising. We were at the beginning of our 1 week vacation and fortunately I was able to get back up and running in a few hours with the aid of a rebuilt spare. The more i think about it the more annoyed I get that the shaft just broke. The bearings seems fine and there was no sign of leaks. It looks as if the metal just failed. I've called WM and they said i should have purchased the extended warranty. I'm going to call Sierra on this next, if nothing else just to make them aware of their poorly made product. So I post this partly to vent as well as a PSA about this product.