M661 Drive Arm$39.00 Replacement drive arm for our M661. Connects with a drive spring to the reel. M661 Drive Arm quantity Add to cart Description Description Small drive arm (drive rod), for our M661. Connects to the reel using the DS21 Drive Spring. Part no. M661-1100 Related products M888 Complete Gearbox $1,040.00 Add to cart 2.5″ O.D. x 1/2″ Pulley $30.00 Add to cart Autofeed Cylinder Thrust Race $4.25 – $6.50 Select options Large Drive Arm $39.00 Add to cart 2″ O.D. x 5/8″ Pulley $30.00 Add to cart