JH Series 28.7–92kW (39–125HP) Three and four-cylinder direct injection diesels with heat exchanger cooling. Choices of natural aspiration, turbocharged and turbo/aftercooler models, with straight drive or angle drive transmissions. Smaller horsepower models are also offered with Saildrive units. JH Series 4JH4 (54HP/39.6kW) Wisper quiet, smooth running at all speeds and with extremely low vibrations, it produces 25% more torque from just 10% additional displacement compared to the model it replaces but precisely the same size. Dedicated to boating and with the smallest dimension in its class, the 4JH4 matched several transmission options, including the heavy duty SD40 saildrive with its patented dual-seal diaphragm and audible water sensor.

Technical Specification:
Spec Value
Power (Crankshaft) 39.6 kW (54hp) @ 3000 rpm
Full throttle operating speed 3000 rpm
Displacement 2.19 litres
Bore x stroke 88 mm x 90 mm
Cylinders 4
Combustion system direct injection
Alternator 60A