I recently acquired a Stihl fs46c trimmer in pretty good condition with a brand new carb and fuel lines, turns out the flywheel key is destroyed causing the timing to be off. I am fairly good at repairing small engines and have disassembled the engine enough to verify a destroyed flywheel key, question is on this model can anyone tell me if while shopping for a replacement, should I be looking for an individual key or is it machines into the flywheel? Like anyone I want to fix this trimmer with minimal cost and want to know if just a key can be purchased or if an entire flywheel assembly is needed, thanks in advance!