this is a chainsaw that wouldn't run. I couldn't figure it out it would pop and sputter but wouldn't run. eventually I noticed the ignition timing was off a little bit and was pushed past it's advance since it
ate the woodruff key on the shaft which messed up the ignition timing. so instead of firing before TDC it was firing after TDC. so I decided to spin it backwards with a drill and sure enough it runs backwards and it runs really aggressive. it will only idle when chocked if you take off the choke it revs up (5000ish) and if you open the throttle it just gets insane (16,000ish) if I kept this engine in rev I have no doubt it would cook itself to death in a minute or 2. it's only an aluminum block and it gets nuclear hot running like this.
