How to Size the Right Replacement Electric Motor for Your Air Compressor - Compressor Source 

Did you ever find an answer? I think I probably have the same compressor.

It’s probably the centrifugal switch on the back of the motor that’s not disconnecting after start up

You won't. You'll be overworking that motor because it'll have to run longer to keep that volume of air at a given pressure. You'll far exceed the duty cycle of that motor.

Same question i have i have 4 hp i want to pute a 5hp motor

@@shark3393 yes you have my permission

I have a 11 horse Honda motor on my aircompresser. I want to replace it with a electric motor what size motor do I need?

@@jacobhershberger7312 Rule of thumb gas:electric = 2:1 HP. A 5HP is sufficient.

As long as the frame fits, you can always go up in HP with the same RPM.

Hi Thomas, This website has a handy tool at the top to help you get a ballpark on your pulley size and resulting RPM: gadi.agric.za/software/renting/pulley_calc.php We generally use it to help figure out the pulley size for the motor as the flywheel size, recommended pump speed, and motor RPM are usually known factors. But you can use that tool to figure out any of the four factors. We'll definitely looking into doing an RPM specific video in the future though. --Dan

@@compressorsource That link does not work.

Then you buy a new completed air compressor.... Probably save money and eliminate blowing up the tank up and potentially killing someone.

@@TheBrandocando w For some people... I took an compressor(speed air 2 cylinder), a 32 gallon standup tank of an old craftsman and an electric motor I scavenged. Pulled a fly wheel off one unit another off another and now I have the quietest air compressor I could have ever dreamed of. It took a few hours longer than I would have liked but the knowledge I learned about tube fitting sizes and coupler sizes was worth every min. Some catch the vibs and some catch the vapors.....

Good luck getting a cheap, US made anything. There are good, foreign made products, and bad US made products. Cambell is a cheap, homeowner brand so you can expect they are using cheap, relatively unreliable motors and compressors. If you got 3 years out of it, you got what you paid for. Putting an expensive, quality motor on a 3 y.o. CH compressor that may have another year or two of life--how does that make sense? You do realize that a robust, 5HP motor will cost you twice what your entire CH setup cost, right? Better off to buy a good, used commercial unit. Or buy a quality compressor and pay for it. Buy once--cry once.