KAD42P-A; KAMD42P-A; HS1A Transmissions Duoprop Drive Unit: RATIO 1.78:1 Parts on group Duoprop Drive Unit: RATIO 1.78:1: Pos. Part No Qty Parts name Comments 1. 3868639 [1] Drive (3868023), (872298) 2. 873310 [1] Gear 3. 7734180_096 Intermediate housing 4. 872297 [1] Gear 5. See group 64 6. 876266 [1] Gasket kit, upper gear See group 99 6. 876639 [1] Gasket kit, Lower gear See group 99 Parts catalog : Duoprop Drive Unit: RATIO 1.68:1 Duoprop Drive Unit: RATIO 1.59:1 Transom Shield Exhaust and Cooling Water Pipe Hydraulic Pump and Trim Instrument Flywheel Housing and Primary Shaft Upper Gear Unit Intermediate Housing Lower Gear Unit: RATIO 1.59:1 Lower Gear Unit: RATIO 1.68:1 Lower Gear Unit: RATIO 1.78:1 Duoprop Drive Unit Ratio 1.78:1