I have a 920 turbo that runs excellent and really rips for about 2 hours, then gets finicky. I still use it today as my feller as I love the saw, but, the new 661 is taking over. I have tried to find the coil, which is a 2 part for a decent price to see if that remedies the issue. I replaced all the rubber mounts with good used ones last year. I can get you pic's and a video over this weekend, if you are still interested. Price? Make me an offer after I get you some pic's and a video. My email is [email protected].