Chainsaw Repair

I don't know if this applies or not .However certain Stihl models used self advancing ignition moduals .

Now I have no idea how it could happen or even if it's possible but it theoretically reversed the spark .If it did though it would have to have came to a complete stop then start up again in reverse .The compression could have at least in theory kicked it over backwards enough to restart .

Way back when they used to get kart engines running backwards .Rather comical to watch .


I've had the SEM coils go bad where they would not advance which causes them to run at about 1/3 speed .Conversely I've had Briggs and Stratton coils stick on full advance making them impossible to start. Also makes the magic smoke go out of the little starter motors .