Yanmar Saildrive Series Marine Diesel Engines
GM Series 9.1hp | YM Series 14hp
Smart escape from conventional drive problems
More and more boat owners are turning to Saildrive power as the smart way to best the problems of conventional stern tube shaft drives. The beautiful simplicity of this compact drive systems makes it the sensible choice for numerous types of boats. Not only is reliability a big element in these designs but also is stability, as they eliminate shaft vibrations, noise, alignment and stuffing box problems.
The logical power-to-prop direct drive combines all the advantages of the outdrive-inboard systems and has now been well accepted in boating circles.
The Saildrive has been found to improve boat balance, give more maneuvrability and better thrust. Drive by the famous Yanmar diesels, these Saildrives put a lot of dependable power in the right place in a boat.
Easily installed with a toughened, thru-hull fitting the new SD50 drive unit smoothly takes the rugged power of the JH diesels, which are now expanded up to 75hp.
Engine Specifications
| GM/YM Series |
1GM10C |
2YM15C |
3YM20C |
3YM30C |
| Cylinders |
1 |
2 |
3 |
3 |
| Maximum Output |
9.1hp @ 3600rpm |
14hp @ 3200-3600rpm |
21hp @ 3200-3600rpm |
29hp @ 3200-3600rpm |
| Cooling System |
Raw Water |
Freshwater |
Freshwater |
Freshwater |
| Bore x Stroke |
75 x 72 mm |
70 x 74 mm |
70 x 74 mm |
76 x 82 mm |
| Displacement |
0.318 litres |
0.549 litres |
0.854 litres |
1.115 litres |
| Saildrive Model |
SD20 |
SD20 |
SD20 |
SD20 |
| Dry Weight |
104 kg |
134 kg |
144 kg |
157 kg |
|
Saildrive Specifications
| Saildrive Model |
SD20 |
SD50
|
SD50-T
|
| Reduction gear system |
Constant mesh gear
with dog clutch |
Constant mesh gear
with cone clutch |
Constant mesh gear
with cone clutch |
Reduction Ratio
(Ahead/Astern) |
2.64 / 2.64 |
2.32 / 2.32 |
2.32 / 2.32 |
Direction of
rotation |
Input shaft |
Counterclockwise viewed from stern |
| Prop shaft |
Counterclockwise viewed
from stern |
Counterclockwise or clockwise viewed from stern |
| Lubricating System |
Oil bath |
Dry weight - kg
(Saildrive only) |
30 kg |
40 kg |
42 kg |
| Lubrication oil for saildrive |
1GM10C= SAE20/30 |
API GL4 or GL5 and
SAE4 80W90 or 90 |
API GL4 or GL5 and
SAE4 80W90 or 90 or
Quicksilver high
performance gear lube |
Quicksilver high
performance |
