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Saildrive 20
All Yanmar Saildrives feature the patented double-seal safety technology with audio warning device. These are lightweight, compact diesels with SD20 or SD50 drives. They help eliminate shaft vibrations, noise, alignment and space problems with their direct power-to-prop configuration. Boat balance, manoeuvrability and thrust are improved.
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2YM15C x SD20 |
3YM20C x SD20 |
3YM30C x SD20 |
| Configuration |
4-stroke, vertical, water cooled diesel engine |
| Maximum output at crankshaft |
10.0 kW (13.6 mhp) / 3600 rpm1 |
15.3 kW (21 mhp) / 3600 rpm1 |
21.3 kW (29.1 mhp) / 3600 rpm1 |
| Continuous rating output at crankshaft |
9.4 kW (12.8 mhp) / 3489 rpm |
14.7 kW (20 mhp) / 3489 rpm |
20.1 kW (27.3 mhp) / 3489 rpm |
| Displacement |
0.57 L (34.7 cu in) |
0.854 L (52.1 cu in) |
1.115 L (68 cu in) |
| Bore x stroke |
70 mm x 74 mm (2.8 in x 2.9 in) |
76 mm x 82 mm (2.9 in x 3.2 in) |
| Cylinders |
2 |
3 |
| Combustion system |
Indirect injection |
| Aspiration |
Natural aspiration |
| Starting system |
Electric starting 12 V - 1.4 kW |
| Alternator |
12 V - 60 A (80 A optional) |
| Cooling system |
Fresh water cooling |
| Lubrication system |
Enclosed, forced lubricating system |
| Lubrication oil for Saildrive |
API GL4 or GL5 and SAE 80W90 or 90 |
| Direction of rotation (propeller) |
Counter clockwise viewed from flywheel side |
| Dry weight with Saildrive |
134 kg (295 lbs) |
151 kg (333 lbs) |
157 kg (346 lbs) |
| Environmental |
EU RCD, BSO II & EMC |
| Engine mounting |
Rubber type flexible mounts |
NOTE: Fuel condition: Density at 15°C = 0.84 g/cm 3; 1kW = 1.3596 mhp = 1.3410 HP
1 Fuel temperature 40°C at the inlet of the fuel injection pump (ISO 8665)
Technical data is according to ISO 8665 / 3046
Features
Yanmar Saildrive 20
| Reduction gear system |
Constant mesh gear with dog clutch |
| Reduction ratio (fwd / asn) |
2.64/2.64 |
| Propeller speed (fwd / asn) |
1364/1364 |
Direction of rotation
(propeller shaft - fwd) |
Counter clockwise viewed from flywheel side |
| Dry weight Saildrive |
30 kg (66 lbs) |
Performance Curves
2YM15C
3YM20C
3YM30C
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