MD11; MD11C; MD11D; MD17; MD17C; MD17D Transmissions Sail Boat Drive Unit 110S, 120S: A Parts on group Sail Boat Drive Unit 110S, 120S: A: Pos. Part No Qty Parts name Comments 1. 850056 [1] Drive Ratio 1,66:1 2. 850057 [1] Upper gear 3. 850067 [1] Lower gear 3. 875591 [1] Gasket kit See group 10A Parts catalog : Sail Boat Drive Unit 100S Hydraulic Transmission: MD17 Hydraulic Transmission: MD11 Reverse Gear MS2: 851611 Reverse Gear MS2: 851610 Reverse Gear Sail Boat Drive Unit 110S, 120S: 120S Upper Gear Unit Sail Boat Drive Unit 100S Intermediate Housing Sail Boat Drive Unit 100S Lower Gear Unit Sail Boat Drive Unit 100S Upper Gear Unit Sail Boat Drive Unit 110S Lower Gear Unit Sail Boat Drive Unit 110S