It depends on the AR pump you got.I have a Jenny and it has an AR pump belt drive.This rig is 10 years old and still runs like a top.She runs every night and sometimes night and day.This unit pumps 1250psi at 3.5 gallons and burns very hot.This is my exhaust hood cleaning machine now my surface machine is a MiTim 796cc brigs with an general 3000 at 6 gallons and it is 24 years old.Still run very well.The point is, is that its the grade of pump not the brand.They have high grade pumps made to run all the time and they got homeowner units made to run a few times a year. thank you