Thanks. I will certainly use the file. I've learned more in the past two weeks chasing this problem around than I have in the 17 years of owning this blower.
All very helpful comments in this forum.
Like why we charge so much to repair problems. I guess it because of how we must disassembly things to get to problems. I had customers to watch me at times; unless, another tech and they wonder how can I be so fast at it and remember where everything goes. I had few customer to say oh they just re-assemble their equipment after the parts came in since was taking me longer than they like as I had others ahead of them to only realize they were way over their heads and let me complete the work. Nothing like handing the customer their handheld in a box disassembled.
On this blower the flywheel is in the fan box but the new version Stihl changed to a dog bone flywheel on the recoil side. Way easier to check and replace. But that is a complete different engine design.
Like anything it take time and lots patience. This hot weather is causing me to lose some my mine lately. I was about to end mine yesterday on removing two king pins on a TB Horse tiller. It took 3 hrs to get them out as other things had to remove before I could the torch to where I needed to heat. And it still nearly 30 min per pin. I was lucky that my pin driver made it through the last pin before it failed. Now I got buy a new set of pin driver since I can only them in a set. Boy 40 yrs of rust is a pain.