Thanks very much for that info! I never heard of broaching before but did a little YouTube searching and turned up several videos, like this - - which, although somewhat DIY, does show how it's accomplished and the tools involved. I've always wanted a manual press like that so maybe I'll start asking on FreeCycle and Facebook channels to pick up a used one as well as investigate where to purchase broach tools specific to most of the keyways for chainsaws, lawnmowers, etc. I'm also going to search "using a timing light on a chainsaw" on YouTube since I haven't seen that operation yet. I've watched plenty of guys showing the use of degree wheels, piston stops, etc., so my knowledge is growing, little by little, to understand this whole process and the theory of operation for small engine timing. I have watched a lot of videos dealing with kickback and causes in various categories of machines. It seems like ones with the timing slightly off is one of the more common causes (due to the engine being stopped violently for one reason or another) and the reason is invariably due to the keyway becoming misaligned to the flywheel. Thanks again!