Well, I did something stupid....was using my Ironton (sold by Northern Tools) pressure washer. I thought it was rather low on pressure. After quite a while, it ran out of gas. I filled it up, and started it up. That's when I realized that I had been running it with the choke on the whole time! I turned off the choke, and it backfired and died. Now, it only backfires....won't start. I thought that maybe I had sheared the key, but it was fine. I'm guessing that the valves (OHV) need adjusting, but I can't find valve specs anywhere! Its an Ironton 2600psi pressure washer, and the motor is 180cc, model number 2623HP-IR-001E. Any idea where I can find the correct valve lash? Thanks.