MD6; MD6A; MD6B; MD7; MD7A; MD7B 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 : Lower Gear Unit Sail Boat Drive Unit 120S Upper Gear Unit Sail Boat Drive Unit 120S Lower Gear Unit Sail Boat Drive Unit 110S Lower Gear Unit Sail Boat Drive Unit 110S Upper Gear Unit Sail Boat Drive Unit 110S Sail Boat Drive Unit 100S Sail Boat Drive Unit 110S, 120S: B Sail Boat Drive Unit 110S, 120S: 120S Coupling Flange: 806384 Coupling Flange: 827637 Coupling Flange: 827924 Coupling Flange: 827926