JH4 Series (Saildrive)

JH4 Series (Saildrive)

Introduction

JH4 Series - Saildrive

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 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.

Yanmar JH4CE

Specifications

	3JH4CE	4JH4CE	4JH4TCE
Cylinders	3	4	4
Maximum Output	39mhp @ 3000rpm	54mhp @ 3000rpm	75mhp @ 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	SD50T
Reduction gear system		Constant mesh gear with cone clutch	Constant mesh gear with cone clutch
Reduction Ration (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
Lubrication 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 luve	Quicksilver high performance gear lube