223L e-tech string trimmer won't start

Is there spark?  Sounds like your magneto died.

Sometimes you don't see the forest because of all the trees. 2 months ago I finally stumbled on to the problem after I had taken everything apart, cleaned, inspected and checked. Timing was correct (no sheared off key), I had good spark, all the fuel lines were solid, no leaks, new spark plug etc. So 2 months ago I tried it again. I pushed the primer bulb like I did a 100 times before and I thought it felt a little soft. I took a very close and good look and I noticed it had a small crack near the base. I shrugged it off to "so what", the crack is so small it doesn't even leak, but it isn't right so I will replace it. I did, primed it, pulled the starter string and I couldn't believe my eyes and ears. It started right up and ran like a dream, just like it did in September 2021, before the problem started. I was just standing there in total disbelieve. I went through all of this over a frikken primer bulb, which took me 10 minutes to replace. Well, the bright side is, the string trimmer got a good going over and is in great shape now.