just bought the RD80701 pressure washer Friday, used it a couple of hours, no problem. Today the on/off switch does not seem to work. If I put a lot of pressure toward the off position, it will kill engine, but engine will start with the switch in the off position. HD offered to replace it, but it is a hassle bringing it down there. Is there a quick fix? It looks like the switch is just held on with 2 philips screws... also, the right hand wheel axle cotter pin keeps coming off???