This series of exceptionally light and compact engines, features very high reliability in every condition; furthermore, this specific project has been carried out in order to optimize durability and low fuel consumption without reducing the performance of the engine.

4 stroke marine diesel engines, fresh water cooled via heat exchanger with zinc anode protection; cast-iron engine block; one piece cast-iron cylinder head, reborable liners; indirect injection; gear driven single shaft with push rod valve operation; hydraulic tappet; crankshaft mounted vane type lubrication pump; water injected stainless steel exhaust elbow; self-priming sea water pump; air filter. Special anti-corrosion treatment.


The camshaft is located in the upper part of the crankcase to allow a reduced width in the lower area of the engine.

The innovative design of the gear train, the injection system design and location, and the reduced cylinder pitch, shorten the engine length.

The special crankshaft balancing gives exceptional low vibrations and ensures an excellent operational performance during use.

The innovative design of the fuel injection system, as well as the utilization of hypereutectic pistons which reduce piston slap, and the utilization of a heavy-duty block, assist in greatly reducing noise levels that are normally associated with diesel engines.

The QLC pump, offers high performances on all engine speed. Compared to the conventional injection pump, QLC features a one way flow and a unique delivery fuel system that prevents unwanted variations on injection pressure and timing, eliminating gas bubbles.

This line of engines, due to their advanced design of the injection and combustion systems results in improved environmental behaviour in conformity with expected pollution limits.

These exhaust emissions and the engines performances are checked with dedicated test rigs on 100% of the Lombardini Marine production.

All maintenance operations are made easier due to the simple construction of the product. Also for maintenance of the QLC pump it is not strictly necessary to involve the services of a pump specialist, but the servicing of parts can be completed by any qualified workshop.