Steve:
I see you need an ignition for your 2100CD. This gets brought up from time to time here on AS. I know you would also like a working chainbrake. Also tough to get. These are the two hardest things to find I think in the 2100 line. Great saw, VERY easy to work on, made for a long time, but ignitions don't last forever, well some do, but thise ignitions were prone to fail eventually.
I know this post is almost 7 years old, but I am basically bumping it to help keep people in tune with buying the venerable Husky 2100. I was new to this site, started wanting a huge saw, and could only afford the 2100. Bought one from someone up north mentioned last week on the chainsaw forum, and basically chased my tail for a year, before I got rid of it. It was a truly great saw in its day, but it's not easy finding one that hasn't been "Frankensawed", and for the fellow cheapskates out there, I vote for saving your money and buying something more modern.
I'm only posting this because I see someone asking about the 2100 again, and this problem has been on the forum since the beginning of this forum...
Jason