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The pump has been installed on the trailer and will move water. It'll empty (or fill) the 500 gallon tank in about 5 minutes. The cattle enjoy some fresh cold water on the hot still days when there isn't enough wind to turn the windmills. Here are a few pictures at the end of a successful...

I picked up a cheap blaster and hit the pump housing with some glass beads. Not perfect, but better than it was: There were some areas that were pitted from corrosion. I filled the pits and smoothed things over with marine epoxy. After it hardened, i gave it a quick sanding with some 120...

Thanks for the advice. I'll start with vinegar and see how that goes. My goal is to fit it onto a 500 gallon water wagon that the in-laws can use to haul water to cattle and maybe help put down the occasional brush fire. It's probably overkill for that, but we'll see how it goes. There was a...

So, what's the best way to deal with this corrosion? Guessing that might vary a bit based on materials. According to the manual there's a bit of a variety: Part Material Pump body AL 319 Inboard head AL 319 Impeller BRONZE 85-5-5-5 Strainer 360 BRASS Drain valve 360 BRASS...

On the bright side, once the impeller came loose, the engine (Yanmar L100) freely turned. The air and oil filters looked good, compression felt good, so I added fresh oil and a little fuel, then primed it 10 pulls while holding the decompression lever. After that the engine started on the...

I bought this water pump in unknown condition. When I finally received it, I found it was seized up. There was a lot of corrosion on the impeller that was visible by removing the cap from the inlet port. I'm guessing it was used with salt water and put away wet. The tag on the pump is hard...