Compact power

Yanmar launches the 3JH40, a CR Inboard Marine Diesel Engine.

Yanmar Marine International launched the latest addition to its family of new generation common rail (CR) diesel engines, the compact Yanmar 3JH40 inboard engine, at boot Düsseldorf.

The 3-cylinder 3JH40 has been developed by leading manufacturer Yanmar, with the company claiming it as the marine industry’s smallest CR inboard diesel engine.

With an output of 40 mhp, it will enable a whole new category of smaller leisure boat owners and commercial vessel operators to benefit for the first time from the efficiency and performance advantages associated with the most recent electronically-managed CR fuel-injection technology.

Offering minimal fuel consumption and exceptionally low noise and emission levels, the new Yanmar 3JH40 propulsion engine surpasses EPA Tier 3 and EU RCD Tier 2 emission regulations for virtually smoke and odour-free operation.


The 4-stroke, water-cooled 3JH40 is an ideal solution for new builds and repowering applications, specifically monohull sailing yachts and catamarans up to 45 foot, small motor boats or sloops, and light duty commercial craft.

Weighing 192 kg and with 1.642 L displacement, the engine can be operated by either standard mechanical cable controls or the Yanmar VC10 electronic control system.

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