Yanmar JH4 Saildrive Series
Marine Diesel Engines
JH4 Series 39 - 75mhp
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 moremanoeuvrability 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.
Why
choose Yanmar?
3JH4CE
4JH4CE
4JH4TCE
Cylinders
3
4
4
Maximum Output
39mhp @ 3000rpm
54mhp @ 3000rpm
75mph@3200rpm
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
SD50T
Dry Weight
213 kg
240 kg
249 kg
Saildrive Model
SD50
SD50-T
Reduction gear system
Constant mesh gear
with cone clutch
Constant mesh gear
with cone clutch
Reduction Ratio
(Ahead/Astern)
2.32 / 2.32
2.32 / 2.32
Direction of
rotation
Input shaft
Counterclockwise viewed from stern
Prop shaft
Counterclockwise or clockwise viewed from stern
Lubricating System
Oil bath
Dry weight - kg
(Saildrive only)
40 kg
42 kg
Lubrication oil for saildrive
API GL4 or GL5 and
SAE4 80W90 or 90 or
Quicksilver high
performance gear lube
