I have to agree with everyone else, start over. If it was me I would head down to Home Depot and pick up a Ryobi CS-30 string trimmer. It has a Homelite 30cc twin ring engine in it. I just got the last one my local store had a week or so ago. They sell for 99.00 around here, well they did all season. Mine was actually the floor display model which was missing the string head and they took 20.00 off the price. And now that you have a fresh start do all the mods, from mild to wild, that are talked about here.