RE: Weed-Eater Conversion
Did you check the plug and/or the ignition wiring?
Oh,by the way ,in some weedeaters like the poulan 21 I have (model GTI 15 T),if you run them on nitro based glow fuel,at the higher rpms ,you can shut the ignition off and they will still run!
And this is with no adjustment to the engine.And it runs smoothly too!