How much oil do you put in the pump of your pressure washer model 01902?

For the pressure washer model 01902, you typically need to add about 0.4 liters (or roughly 13.5 ounces) of oil to the pump. Always refer to the owner’s manual for your specific model for the exact amount and type of oil recommended, as this can vary. Make sure to check the oil level regularly to ensure optimal performance and longevity of the pump.