Change the oil in the high-pressure pump after the first 50 hours of use and every 500 hours (or annually) after that.

Replace the high-pressure nozzles every six months.

Change the oil in the  engine every 25 hours and the oil filter every 50 hours; or, for a unit powered by an electric motor, grease the motor every 250 hours.

Change the engine fuel filter and spark plugs every 500 hours or six months.

Clean the water screen filter weekly.

Remove burner soot and de-scale the heating coil at least once a year.

Winterize your pressure washer to prevent freeze damage to the pump and heating coil.

Never start a pressure washer without water.

Always neutralize and flush detergent from the system after use.