You might have to put a new sparkler plug in? You know, if your power equipment don't run right, it's always the spark plug's fault. 7-10 customers that walk in to the shop I work at, believe this. It's the first thing they ask for. I had one wingnut come it ask for a spark plug for his tiller because his tines wouldn't turn. I asked him if his engine started and ran fine. The customer said "Yea, but my tines won't turn, the plug is defective." I told him he my have a broken idler, drive belt, sheared key/pin, or gear case that is out, and all the spark plugs in the world weren't going to solve his trouble. He was still convinced the plug was bad. He took a new plug home, called back 15 minutes later to tell me my new spark plugs were defective too.
Nick