Guys, i decided to try "mechanic in a bottle" that I asked about in an earlier post. I used it on my echo 2 cycle edger. Its 15 years old and has always been reliable. However, this year it would not idle. Once you let off the throttle it would go dead. I figured it was fuel related and tried adding seafoam to the fuel but had no luck. I bought mechanic in a bottle at Home depot. I followed the instructions for "non starting engines" on the back. I dumped out the gas in the edger, started it, and ran it dry. I then cut the switch off, poured in two ounces of MIB, primed and pulled the cord a few times. I then let it sit overnight. The next day, I poured the excess MIB out of the tank. The edger was a little hard to get started, but once it started running it would idle again. So, my first experience with this product is favorable. It might be worth a try on some poorly running lawn equipment if you don't want to pull the carb.