It's a 40cc Ryobi with an 18" bar. Starts and runs good, has a few cords under it's belt. Here's the issue. At first it runs and idles great but after a while of use the idle goes thru the roof and the switch won't even turn it off. If I put the switch in the off position then gun it, it will die. I do most cutting with the Echo but I like this thing for the big stuff which it handles pretty well. If It would stop acting goofy I might use it more. Any Ideas?? (besides making a lawn ornament out of it)