I don't use a pressure washer on any vehicle. The seals on headlights, tail lights, body panels, etc age and are easily damaged.
I see water damage from pressure washers often, corroded ABS connectors, lights full of water, damaged bearing seals, suspension bushings, all sorts of stuff where water was forced into the parts through the seals under high pressure where it wouldn't normally be bothered by normal rain or splash.
All i can say is if someone wants to use one of the car wash types or a low power unit keep it at a good distance and don't try to clean something off by hitting it close.
A converted shower head or lawn sprinkler works great on the underbody.
The op has a Sears brand, B&S US made 4 cycle engine, 2200psi, this can wipe seals out and remove paint quick!