A-B1579868MA-AI CHAIN,ROLLER 420X18.0One New Aftermarket Replacement Roller Chain for Murray Fits Briggs and Stratton Snow Blowers This #420 x 18 link roller chain serves as the ground drive chain on Murray (Fits Briggs and Stratton) dual stage snow blowers. It drives the hex assembly that rotates the friction wheel disc, transferring power from the engine to the ground drive system for forward and reverse travel. This is an aftermarket replacement for OEM part number 579868MA
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