My brother has a Partner stone saw with 2-stroke petrol engine. When it's started it's about as likely to go the wrong way as the right. His first thought was - why isn't the exhaust coming out through the carb when going the wrong way? I had a think and convinced him that on a basic 2-stroke, no valves, the ports work the same way whichever way it's turning. Only difference is if it's meant to fire say 5° before TDC, when the wrong way it's 5° after.
I assume it fires before TDC when cranking, and sometimes the advance overcomes the forward momentum, kicking it the wrong way. It does sometimes give quite a nasty jerk on the starter cord, for a small engine. It has electronic ignition, and the on-line operating instructions don't give the timing point, and there's no way of adjusting it.
Anyway, I thought it was interesting, anybody comment?
I assume it fires before TDC when cranking, and sometimes the advance overcomes the forward momentum, kicking it the wrong way. It does sometimes give quite a nasty jerk on the starter cord, for a small engine. It has electronic ignition, and the on-line operating instructions don't give the timing point, and there's no way of adjusting it.
Anyway, I thought it was interesting, anybody comment?