How to Winterize and Store a Pressure Washer

Winterizing your pressure washer is necessary to prevent water from freezing in the pump, as frozen water could permanently damage it. If your pressure washer is to be stored for two months or more, some precautions need to be taken.

Winterizing the Pump

• First, disconnect all the hoses and the gun and wand assembly from the pressure washer, draining as much water as possible.
• For optimal results, use STIHL Pump Conditioner and Winterizer. Attach the pump winterizer directly to the water inlet.
• Turn the knob on the bottle to the open position.
• Pull on the cord several times with switch/lever in OFF position until the liquid coming out is 100-percent solution.

Winterizing the Engine

• Add a quality fuel stabilizer to fresh gasoline.
• Run the engine for two to three minutes to get stabilized fuel into the fuel system.
• Store the unit in a clean, dry place.