3120xp husqvarna

I have a 3120 I replaced the crankshaft, bearings, seals and put on a hyway P/C and when I put it back together it backfires and dies. I checked the flywheel key it was fine. I tried a new carb same thing. I removed the kill switch didn’t help. I tried 2 other known good ignitions. It...

I've just bought this saw from a friend of a friend, he's owned it since new and has only used it a handful of jobs as its too big. I'll not disclose what I paid for it yet as I want some opinions on it, and I'd like to know how much they are new. When I get Heath's MMWS 2100 posted over the...