GM / YM / JH3 / JH4 Series - Saildrive
 
 
Yanmar Saildrive Series Marine Diesel Engines
GM Series 9.1hp  |  JH3 Series 75hp
YM Series 14hp - 29hp   |  JH4 Series 39 - 54hp
 
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
Saildrive Specifications
Brochures
Performance Curves
AutoCAD Drawings
Line Drawings
 

Why choose Yanmar?
 
 



[Click image to enlarge]


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
   
 
JH3/JH4 Series 3JH4CE 4JH4CE 4JH3-TCE
Cylinders 3 4 4
Maximum Output 39hp @ 3000rpm 54hp @ 3000rpm 75hp @ 3800rpm
Cooling System Freshwater
Bore x Stroke 88 x 90 mm 88 x 90 mm 84 x 90 mm
Displacement 1.64 litres 2.19 litres 1.995 litres
Saildrive Model SD50 SD50 SD50-T
Dry Weight 213 kg 240 kg 261 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 gear lube
   
  Performance Curves


4JH3-TCE - Performance Curves
 

Brochure (PDF)

Brochure - 1GM10C
Brochure - 2YM15
Brochure - 3YM20
Brochure - 3YM30
Brochure - 3JH4E
Brochure - 4JH4E
Brochure - 4JH4TE
Brochure - SD20
Brochure - SD50


 

Line Drawings (PDF)

Line drawing - 1GM10C -SD20
Line drawing - 2YM15 - SD20
Line drawing - 3YM20 - SD20
Line drawing - 3YM30 - SD20
Line drawing - 3JH4E - SD50
Line drawing - 4JH4E - SD50


 

AutoCAD Drawings

Download - 3YM20 - SD20 Drawings - ZIP file
Download - 3YM30 - SD20 Drawings - ZIP file
Download - 3JH4E - SD50 Drawings - ZIP file
Download - 4JH3TCE -SD50 Drawings - ZIP file
Download - 4JH4E - SD50 Drawings - ZIP file


Drawings are in Drawing Interchange Format (DXF)
 

Download free DXF Viewer here [6.7MB]
 

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