if you run into wacky idle issues, racing at idle and dying at idle, compare a new linkage to the one on the saw, they look fine UNTIL you have a new one to compare to
check with Mike Glock37 for details he spent a lot of time getting cozy with one his dealer gave up on
right after he told me about it I told my dealers service manager the story because it is kinda funny all they went through to find the problem and he thanked me later, because they had the same issue and replaced the linkage first before wasting time and money on all the other stuff