So my old big air compressor has been down for a few years now due to a bad electric motor. Old motor was a H-F motor I got 20 plus years ago and was said to be a 6HP 230 volt that had a draw of 15 amps. Was in town today having a couple capacitors tested and they where found to be bad so got 2 new ones for my junk oil-less compress since it has not been starting like it should. Figure it is about time to bring the old big one back to life. While talking to the guy at the motor place he was saying they go more by volt/amps then rated HP. He said there 5HP 230 volt would be likely to be a replacement for the old motor it had on it. Cost is almost $400. Surplus center has 3 different rated HP motors bot a good bit less so now I am not sure if I should go with rated HP or go with amp/volts