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Cool, I think I can probably rig something up to work with that.

Is there anything written on that 2 prong connector? On the black part?

Take pics of the pump and the motor especially. See if you can get a max amp draw off the motor data plate. I'm going to make a WAG tho, and say that motor is probably 2hp. Which would make the switch something like 60 amp at 24 volts. Or else it uses a smaller switch and power supply to...

What's it's max current draw?

85 RPM is really low. Which means either an expensive gear motor or you do all the reduction yourself with chains and sprockets or pulleys and belts. If you do it yourself, you're going to need alot more space. I reduced a treadmill motor down to around 20 rpm, but I had to turn an 18" wooden...

Picked up a SBC pump at o'reilley's today for 17 bucks. Yeah, I'm going to shoot for 2000 rpm on a 1 horse motor or whatever motor I can find. At least 1/2 hp. Which means I'll probably have to do a 3:2 reduction with pulleys.

Yep, saw that, thanks. Cheap way might be the old standby: Used treadmill motor. They're usually in the 1.5 to 2.5 HP range, around 3400 rpm, and are 90VDC and reversible, which I guess would be handy if anything got clogged in the motor. It'd definitely have enough oomf to handle gear oil.

Wait, nevermind, he did give the speed. 2750 rpm. That means his pump was exerting about .76 ft-lbs

Ok, that motor on the one gimpy posted looked a little wimpy, but it seemed to do decent when both containers were roughly level with eachother. https://www.surpluscenter.com/item.asp?item=10-2040&catname=electric Here's a single horse motor that turns at 3450 rpm. That's about 1.52 ft-lbs...

My one concern about that is, how rough would that be on the compressor? I know it's gear driven so it doesn't have an electric duty cycle... but still, I would think that kind of air would require it to run constantly. And I just don't know enough about deuce air compressors to know if that's...

What's an SBC oil pump? Junkyard engine oil pump? Eta: Ok, I think I get what you're saying. Basically just scavenge an old engine oil pump from a junkyard and couple it to an electric motor. This picture should tell you what I think of this idea: [thumbzup][thumbzup][thumbzup]

Sadly, it is not rotary. Back and forth operation, otherwise I would have tried that. Even so, this stuff is really sludgy.

I've got about 400 gallons of WMO another member gave me. Well today I finally got around to trying to transfer it to my holding tank with my hand diaphragm pump. That was rather optimistic. After about 5 or 10 minutes I had all the settled water pumped out and started on the oil... too...