Originally Posted by b14_SR

I just recently bought a 5hp, 20 gallon, oil-lubed, single stage Air Compressor from Napa. Everything works fine and all but it takes forever to cycle up. I mean I would let it sit there for a good hour and it would only reach about 75 psi. It has an automatic off switch when it reaches a certain psi but I had left it on for about 1 and a half hours and it never shutted off. I'm new to air compressor so I'm not sure how long it should take or if that is normal. I don't know the duty cycle. And the manual isn't really helpfull. Just wanted to know you guys opinion. Thanks