I have a McCulloch CS340 chainsaw that cut out the other day and hasn't run since. It has petrol in. It has compression... but it doesn't have a spark. I removed the spark plug and earthed it to the head and pulled the starter cord... no spark. Replaced the spark plug ... no spark. Replaced the ignition coil and also the flywheel with new components. Still no spark. I removed the wires that short out the coil when you want to stop the chainsaw but still nothing. I'm now stumped. Is there something i'm missing?