Just wont crank!
If you String Trimmer wont crank, take out the plug and then try to pull the cord. If you can get the motor to spin freely after the plug is out, then you have one of two issue. Either deposit on the cylinder which is allowing to much compression to build up, Simple fix (buy some Seafoam from your local auto parts store. Remove the exaust and pour some seafoam into the cylinder. Let it sit over night and then clean with 2 cycle fuel, either blow out with an air compressor or let it air dry. Then put the plug, and exhaust back together and that should help. If that doesnt work then you need to see if your carb is leaking into the cylinder, causing hydo-lock, your only option is to rebuild the carb, or buy a new carb.)
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