Yanmar Spare Parts Yanmar Spare Parts Return to Yanmar Spare Parts homepage Contact Minards Diesel Request spare parts for Yanmar diesel engine Yanmar industrial engines and spare parts, TNV and TF models Yanmar Diesel Yanmar marine diesel engines Highly saltwater resistant it will serve harder and longer in the corrosive condition of the sea Yanmar diesel engine workshop manuals available in digital and printed form For Economical Power Generation in a Durable Package, Choose Yanmar's YTB Series The brand name "YANMAR" adopted. By coupling an engine with a rice huller, Yanmar started selling a Powered Rice Huller. This was to be the first powered rice huller in Japan. Yanmar Spare Parts
For motorboat use, Yanmar makes main engines up to around 300kW. Like sailboat propulsion units, their reliability is legendary; but they are also light, compact and powerful.
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.
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saildriveYanmar Saildrive Engines

The Smart Escape from Conventional Drive Problems

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.

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 system makes it the sensible choice for numerous types of boats. They've proved so successful that Yanmar has introduced three new upper-range models from 28.5kW- 37.5kW. 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 manoeuvrability and better thrust. Driven by the now famous JH2 series of 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 newly developed SD31 drive unit smoothly takes the rugged power of the JH2 diesel. 

Yanmar Saildrive Series Marine Diesel Engines
JH4 Series 39 - 54hp

JH4 Series 3JH4CE 4JH4CE
Cylinders 3 4
Maximum Output 39hp @ 3000rpm 54hp @ 3000rpm
Cooling System Freshwater
Bore x Stroke 88 x 90 mm 88 x 90 mm
Displacement 1.64 litres 2.19 litres
Saildrive Model SD50 SD50
Dry Weight 213 kg 240 kg

Yanmar Saildrive Series Marine Diesel Engines
GM Series 9.1hp   |  YM Series 14hp

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

Reliability a Priority 

Just how reliable the Saildrive is can be seen in its record so far. Its dual diaphragm virtually eliminates leakages. The main diaphragm, made of a tough, resilient material is virtually crack-proof to resist damage from any knocks the prop or shaft may take. This tough membrane is backed up by an inner, highly flexible sub-diaphragm. Between these two protective walls is an automatic sensor that sends a warning to the cockpit should there ever be any leakage through the main diaphragm. 

Say Good-bye to Noise & Vibration 

The engine becomes a pleasure to switch on when there's no chance of any disturbance to peaceful boating. No conventional drive system can claim the smooth performance of the Saildrive. The dual, flexible diaphragms stop any contact between the drive and the hull, so there's no transmission via the hull of the usual noise and vibration. As the engine is mounted on a firm cushion of three rubber V-block flexible mounts, engine vibrations are killed before they reach the hull. 

Right for Most Hulls 

Hulls with a high engine bed can easily be accommodated by the extended shaft models in the series. These have an 80 mm longer reach than the standard units. Their extra hull clearance also enables use of bigger prop sizes. 

saildriveA Designer's Delight 

The compact design and unique drive characteristics of the Saildrive allow the boat builder to play with many design options. As there is no restricting prop shaft, no fixed mounting brackets, no stern tube and no Kingston cock, placement and installation are simple and quick. The lower drive and gear section can be turned 180° to suit the keel-hull design and the choice of engine bed locations allow the designer full flexibility. 

A Triumph of Synchronisation 

The combination of the JH2 engine and newly developed SD31 drive unit make a blend of power that is close to perfect. The GM and JH2 engines used in this Saildrive series are among the most compact and lightweight ever developed for pleasure boats. The heavy thrust and high reduction gear ratio make possible an improved bollard pull and extremely stable propeller torque for excellent performance against wind and tides. The fuel economy of Yanmar's diesel is almost becoming a legend and for the long cruises the fuel efficient performance of these engines can be a real asset.

yanmar saildrive Saildrive 20 TechData
yanmar saildrive Saildrive 50 TechData

 

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
Yanmar Spare Parts Its extraordinarily low fuel consumption is a result of this super-precise FIE and its direct injection system-the first ever to go into this type of engine. Now instead of fickle performance common to so many gasoline engines, the diesel outboard presents operational savings and long-term strengths that make pure sense to the commercial operator. When it comes to marine diesels, reliability is most highly valued factor of all. Each Yanmar diesel has been designed and manufactured using knowledge accumulated steadily by us since our founding in 1912. They are built for heavy loads and long running hours and can be matched up with any of the Yanmar engine protection or control systems. If you are looking for a high quality generator, consider one of the models built by Yanmar. Yanmar was founded in 1912 and developed the world's first commercially viable small diesel engine in 1933. For boats, the ability to slot an engine as low down as possible, or to mount twin engines low in the vee of the boat has been critical. 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.