JH4 Series (Shaftdrive)

JH4 Series (Shaftdrive)

Introduction

JH4 Series

Yanmar JH4 Series Marine Diesel Engine
(39 - 54mhp) Naturally Aspirated

Compact mid-range marine power plants

The new 4JH4E 4 cylinder naturally aspirated engine now compliment the 3JH4E to create a family of two lightweight, user-friendly, clean, thrifty and reliable marine diesels.

Lightweight

Compact design iron block and head feature close space cylinders to save space and weight. Extensive use of aluminium alloys in oil pan, covers, and in many parts make for good weight savings.

User friendly

Sophisticated engine mounts, a range of velvet smooth transmissions, micron-precision fuel system components, close attention to bearing tolerances and accurate balance of moving parts make for low-noise, low vibration, low emission, low downtime and easy-to-live-with engines.

Clean

Inlet swirl design improves fuel-air mix, extra high pressure fuel injection system with micron-precision injectors and close attention to coolant flow minimizes hot and cool spots - these are just some of the ways Yanmar improves combustion efficiency.

Thrifty

Diesels are synonymous with fuel economy. But being a Yanmar also means that long years of experience in building some of the world's most efficient diesel, also the extensive input from our large and ultra-modern research facilities have been incorporated into every new Yanmar engine.

Reliable

Long, trouble-free engine life is a common reason for choosing Yanmar. Worldwide parts backup and quick response times make for minimum downtime. These engines are again and again the favoured choice of bluewater yachtsman and boat owners the world over.

Yanmar JH4

Specifications

	3JH4E	4JH4AE		4JH4TCE
Model		3JH4E	3JH4BE	4JH4AE	4JH4BE
Configuration		4-stroke, vertical, water cooled
Cylinders		3		4
Maximum Output		39mhp @ 3000rpm		54mhp @ 3000rpm
Cooling System		Freshwater cooling/heat exchange by centrifugal freshwater pump and rubber impeller sea water pump
Bore x Stroke		88 x 90 mm		88 x 90 mm
Displacement		1.64 litres		2.19 litres
Aspiration		Natural		Natural
Dry Weight (Engine & Gear)		185 kg	186 kg	212 kg	213 kg
Direction of Rotation	Crank shaft	CCW viewed from stern
	Prop shaft	CW viewed from stern
Starter method		12V Electrical