Gentlemen, I just need a part number for a Stihl FS100 Rx. I think it is 4180 120 0608. But, I want to make sure it will work. Thanks
That part # is the most current carb assy C1Q-S131B that does fit on the FS100RX. There was a bulletin in 2008 stating that if you had an older machine you couldn't use this carb without the updated carb cover and choke knob.