I saw that "running the motor without the trigger depressed" comment on the mfg website too, but it didn't tell me what it does to the pump, and how or if it can be fixed. If that is the problem I guess I learned to never buy a used power washer. I bet they don't share that comment with you before you buy the machine either.
Surely the pump can be fixed. If it has built up too much pressure from that, then it has to be a blown seal or gasket which should be replaceable.
Probably a $2 fix, but the mfg isn't forthcoming with the rebuild procedure, and instead, offers a new pump for big buck$.
