Not sure if you've considered this, but we had a similar issue and the problem was the pressure of the water feeding the power washer. Seems obvious in hindsight but running them like you are (start->stop->start) is going to fry that thing in a secondWhat ever you get, do NOT get the one I got. its the Greenworks 1500 psi electric powerwasher. Its a load of bull. It does not have a constant stream of pressure, you have to let it "recharge" after about 15 seconds of using the pressure in the water. There is no place to store the hose, and its a pain in the butt to use. I made a big mistake buying it. But I guess when you spend 100 bucks on one, thats what you get.