First off my trimmer is 5 and a half yrs old with no new parts (keep in mind) The trimmer was running great for the first part of the season but for the last 3 weeks it has been running fine for about 15-20 min and shutting down. Try to restart it and nothing. Next property it starts right up and runs fine agian for about 15 minutes. First off i thought it was a faulty connection with the sparkplug wire and the sparkplug. So i cut the old end and stripped it and put the coil back in and put it back in its housing. (still doing the same thing) So i took off the whole unit magnets and all (since its one unit) and figured maybe they needed to be cleaned off. ( same thing) Im kinda at witts end right now since i have a stupid home owners as a backup. IM hoping its not a big issue maybe just needs a replacement wire magnet and coil housing for the sparkplug. Im hoping thats just it tho any help would be great. I need any comments as soon as possible please. ALl this rain and now its hot and humid GRRRRRRRRRRRRRRr. thanks in advance rob KCM landscaping.