SPECIFICATIONS Note: A propeller with rubber bushing must be used in all SD series Sail-Drives. Note: 1 hp metric = 0.7355 kW SD Operation Manual 53 © 2009 Yanmar Marine International Model SD20 SD50 SD50-4T Reduction Gear System Constant mesh gear with dog clutch Cone clutch Direction Of Rotation Input Shaft Counterclockwise viewed from stern Propeller Shaft Counter-clock- wise viewed from stern Counter-clockwise or clockwise viewed from stern Reduction Ratio Ahead 2.64 2.32 Astern 2.64 2.32 Propeller Speed (rpm) 1364 1293 1337 Lubrication System Oil bath type Lubricating Oil Capacity Standard Unit 2.2 L (2.3 qt) 2.2 L (2.3 qt), SD40:
1.8L (1.9 qt) Long-Reach Unit 2.5 L (2.4 qt) 2.35 L (Extension 58) [2.5 qt], 2.45 L (Extension 100) [2.6 qt] Dry Weight 30 kg (66 lb) 39 kg (86 lb) 41 kg (90 lb) Remote-Control Device Control Head Single control lever Cable MORSE 33C (equivalent) Applicable Engine Model (Maximum Rated Out- put Power At Crankshaft) 1GM10C: 6.7 kW (9.1 hp) / 3600 rpm 2YM15: 10.3 kW (14 hp) / 3600 rpm 3YM20: 16.2 kW (22 hp) / 3600 rpm 3YM30: 22.1 kW (30 hp) / 3600 rpm 3JH4CE: 28.7 kW (39 hp) / 3000 rpm 4JH4ACE 39.6 kW (53 hp) / 3000 rpm 3JH5CE: 28.7 kW (39 hp) / 3000 rpm 4JH5CE: 39.6 kW (53 hp) / 3000 rpm 4JH4-TCE: 55.2 kW (75 hp) / 3200 rpm