Performance upgrade for Yanmar lightweight diesel engine

Delivering 53hp (39.6kW) from the same compact four-cylinder design, the recently unveiled 4JH4AE features a new direct fuel injection system and larger intake valves to increase performance, and further reduce exhaust emissions.

Complementing the direct fuel injectors, the new fuel injection pump provides higher injection pressure along with an electrical fuel feed pump for easy fuel system bleeding.

The 2.19lt naturally aspirated four-stroke 4JH4AE is fitted standard with a heat exchanger, and water cooled via a centrifugal water pump and rubber impeller seawater pump.

Yanmar said the intake valves on the cylinder head have also been enlarged for better combustion and more power, and the engine’s harmonics have also been improved with a larger air intake silencer.

The standard 12V 80amp alternator powers all necessary DC power requirements, with a factory supplied additional 60amp alternator also available.

Yanmar said the 4JH4AE is fully compliant with all the latest emissions regulations, and meets the EPA Tier 2, EU and US 2006 standards.

The engine footprint and size of the 4JH4AE has not changed from the original 4JH4 engine meaning installation instructions remain the same. The engine without a gearbox arrives with a dry weight of 201kg and is offered with a choice of marine transmissions or the well-proven SD50 sail drive gears/drives to suit a wide range of boating applications.

The 4JH4AE is also compatible and can be specified to incorporate the Yanmar KMG65E flywheel generator option.

For more information, phone (03) 9764 0711, fax (03) 9764 0678, or email: power.equipment@yanmar.com.au