motor wont start, where shud I start?

Yea column ignitions aren't the funnest to swap. I am not the best when it comes to electrical issues, but I always go back to the basics...If it starts when cold but not hot it is an electrical resistance issue, make sure all connections are clean and use a test light to see is power is getting to that point. Outside of that...your on your own pal. Hey this might be a good reason to go out and buy a new tool, YEA!!!