Onan MDJE Raw Water Pump Not Pushing Water/ Cure

[bobk]

Thanks for the note. I can see me replacing the Cover Plate next. I am beginning to think these raw water pumps are well dialed in, so that slight wear causes loss of suction. I will hold off on the cam, as total parts cost, not including the impeller could stay below $50. The impellers are the high expense item. I bought a couple of special run-dry impellers from Amazon, but they are a tight fit on the shaft, so I need to hone out the shaft hole and "fit" them. I am hoping they may be more durable.

The Onan impellers seem fragile, compared to say, the Jabsco Toilets impellers, which have a very long life. I do not even pull the Toilet impellers between seasons, and they hold up well!

I tried the blue run dry impellers on my Onan years ago. They wore out very fast, maybe 50 hours or so. The manufacturer replaced them, but the same thing happened. Now I stick with Johnson or Jabsco.

Bobk