I use 2750 PSI pressure washer on my vehicles all the time. I don't use any cleaners. I shy away from wires and belts and rubber hoses. I try not to get water down the carb. I blow dry with compressed air and pull the plugs and spray down the cylinders with some WD-40 and turn it over. I usually do my tuneup after wards and dry my distributor after wards too.