If you have a Honda pressure washer, then you need to change the oil for it to run correctly. To change the pump oil, place the bucket or pan you used for the engine oil under the pressure washer pump oil drain plug. The Brute® 2,800 PSI pressure washer is perfect for all of your standard cleaning needs. I have exactly the same problem with a 4-year old Karcher pressure washer with Honda GCV 160 engine. We would like to show you a description here but the site won’t allow us. Replace the drain plug. For the location of the plug, refer to your pressure washer owner's manual. Remove both the oil drain plug and the pump oil filler cap, and allow the oil to drain. Check all oil levels in the pump or engine if applicable.