Has anyone used a run dry impeller in the merc. plastic raw waterpump housing (46-80151a4) If so will it melt the housing if it runs dry?

was kinda wondering the same thing myself last Fall - Jeff

The answer is yes and no. The inside of my old housing was "rippled" ever so slightly, meaning it still worked, but probably wasn't perfect. It doesn't take long running dry for the impeller to get really hot, then when it stops i think it "spot welds" itself to the housing. Start the motor next time (usually when it's a holiday wkd) and it just rips the @$% out of the impeller....

So, no wawa is no bueno

I want to try some just for extra protection in case water flow is light. But I'll never run without proper hose and muffs, cause it will get hot quick.

I have not run one, but I asked about them a while back, as I've had some problems with the stock impellers, and even though they say run dry, your not supposed to run them dry on purpose, but are suppose to hold up to periods of loss of water much better than the stock one. Nascat here on OSO sells them.