Prep a Pressure Washer Engine for Storage
The small engines on residential pressure washers have a limited life span (sometimes less than 200 hours). But you can extend the life of the engine by following these simple pre-storage tips.
Even if you have only a few hours' use on the crankcase oil, drain the oil and refill with fresh oil (follow the manufacturer's recommendation for viscosity and type). Then run the engine for a few minutes to coat all the internal parts with clean oil and fresh anti-corrosion additives. This will provide the best protection during storage, and you'll be ready to go at the start of the next season.
Whether you run the engine dry or fill the tank to the brim, always run the engine with fresh gas treated with fresh fuel stabilizer first. Run the engine for a few minutes so the treated gas fills the carburetor. Then drain the tank and run it dry. Or fill the tank to the brim.
Also, be sure to flush out the pump before putting it away for the winter. If you leave the pump full of water and you live in a freezing climate, your pump will be ruined.