There are many videos on the repair of many products on youtube. My existing chain saw for example. I looked the model number up , and wala , there it was. I watched it, took my chain saw apart-- ok, not all the way, fixed the clutch part, and it is running now, wow, and no 4 week waiting for some dude to look at it....ok, maybe the videos are not for everyone, but this one was on target...check them out for fun, you may save a buck or two and learn. My son has repaired 2, 4 wheelers using them.