Less than 20 hours, very happy with machine. Homeowner, not a commerical user. Untill today.... Went out to do normal cut, and pulled out of garage, ran out of gas on left tank. Switched tanks, and it restarted no problem, but after about 10 minutes, it started to hesitate, and lose power and after a number of backfires, died. Restarted right away, and ran ok, so I continued, and in about ten minutes it re-occured. You can feel it start to miss, and then a couple of backfires, and its dead. But it restarts fine, and is ok for a while. I would guess fuel, and Im going to refill left tank and see if its fuel tank/side related. Any Ideas???