Warning: I ruined 3 pressure washer pumps before I learned the real trick
For two years I ran my pressure washer without ever checking the oil. I figured if it was full from the factory, it was fine. After burning through 3 pumps in 18 months, a neighbor who does landscaping asked me when I last changed it. I felt pretty stupid. Now I change the pump oil every 50 hours, and my current unit has lasted over 2 years. Anyone else learn a basic maintenance thing the hard way?