Before you spend a bunch of $$ pull the spark plugs out and look down the hole. Your looking for an open exhaust valve with the seal hanging off of it. I don't know why they parked the machine, but that is a common failure of that engine. If you see the seat, just stop. Look for a different motor. I have one sitting like that now, and I'm not even sure what to do with it. It requires at bare minimum complete tear down to even attempt a fix. I'm not willing to spend that much $$ because there is no guarantee that the seat will stay once installed. Too bad, I think it was a good motor.
