Yanmar and ZF in small boat propulsion partnership

This propulsion pod combination has been developed in cooperation with the German gearbox manufacturer ZF This propulsion pod combination has been developed in cooperation with the German gearbox manufacturer ZF

Yanmar has added a new small diesel engine to its extensive range and has combined its existing 4JH80 80hp diesel with a steerable propulsion pod in a packaged propulsion system that offers full joystick manoeuvring control.

This propulsion pod combination has been developed in cooperation with the German gearbox manufacturer ZF.

The new diesel engine is the 3JH40 which is a 3 cylinder diesel that produces up to 40hp making it suitable for a number of workboat installations mainly for inshore and harbour workboats. It is expected to find application in the fish farm sector where the appeal will be the economical operation on diesel fuel.

This engine is one of the smallest on the market to feature common rail technology. The system used by Yanmar has been developed by Bosch and is combined with direct injection. This engine is fresh water cooled with a heat exchanger for the salt water cooling. The 3JH40 is unusual for a modern engine in being naturally aspirated with no turbocharger or intercooler and it is the simplicity of the engine that will increase its appeal in the workboat sector.

The engine comes with a variety of optional features that allow the installation to be adapted to requirements. These include a twin control station, the option of a second alternator on either 12 or 24 volts for craft where the electricity demand is high and a high rise exhaust elbow. The engine is available with a straight or down angle gearbox and can also be coupled to a saildrive unit.

The unique 4JH80 SPP propulsion package is powered by Yanmar’s 4JH80 marine diesel engine which has been purpose engineered to unite with ZF Marine’s new 360-degree rotating saildrive. It also connects seamlessly to the recommended quiet lightweight Vetus extended run bow thruster, all under full electronic joystick control. This complete package makes manoeuvring under power while docking, mooring, anchoring and navigating in busy harbours or tight channels easier than ever before.

The advanced Yanmar 80hp 4JH80 engine uses electronically-controlled common-rail direct fuel injection for responsive, quiet, smooth and fuel-efficient performance. Only compatible with the interconnective YANMAR engine, the 360-degree rotating saildrive is equipped with the latest technology. The entire system comes fully pre-wired for easy and seamless installation.

Easy, smooth precision manoeuvring is possible via the comfortable joystick which can be moved ahead, astern, port, starboard or any points in between to move the boat in the desired direction, or rotated to turn the boat on its own axis. Direct sideways movement engages the bow thruster, which is capable of continuous operation for up to 7 minutes. The speed of the boat is directly proportional to the applied force.

By Dag Pike

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