So I've used this lawnmower twice in the time I've had it, and then winter rolled around and I had no use for it. Now, we need the mower, but there's a problem with it starting. When I pull the chord, the mower engine revs as expected, but doesn't start. I seem to be able to start the engine after tipping the mower onto its side for a few seconds, but a mere few seconds into the engine having started the thing dies. I'm holding down the blade control lever the entire time, I've checked the oil and gas, cleaned the spark plug, but none of it has worked. I think the issue lies in the engine not being able to pull gas out of the chamber to keep the engine running. Anyone know what I should do? Should I just get it to a repairman for him to fix?