I am looking for some advise on routine/preventative maintenance for my pressure washer. I have a 1 1/2 year old Tuff superskid with roughly 250 hours on it. Similar to a car, I assume my pressure washer should have some regular maintenance, but I don't know what that would involve and how much it should cost. I have a basic understanding of an engine, so I have changed the oil, but that's where it stops. I have done nothing with the pump, burner, unloader, etc... I plan on taking my machine into a shop to have the work done, but I want to know what to ask for and what kind of price I should be expecting. Any information would be helpful. If anyone knows a good shop in the Chicagoland area, that would be helpful also! Thanks for your time.