Reliable Design for Long Marine Service

The Weichai WP12 258–405 kW marine engine uses a strong block, crankshaft, pistons, and bearings to support long service under heavy loads. In addition, Weichai’s global supply system ensures stable and trusted quality for all major parts. The engine also passes strict bench and vessel tests, which help it reach an overhaul interval of more than 20,000 hours. Moreover, its self-check program, protection modes, and clear control logic allow crews to manage the engine with confidence.

Strong Power and Quick Response

The WP12 uses an electronic control system that manages fuel injection with fine accuracy. Because of this, the engine keeps high injection pressure and steady combustion across many speeds. Furthermore, the low-speed, high-torque layout offers a torque reserve of 20%–30%, giving fast response when the load changes. This design helps the vessel accelerate smoothly and hold power during long working hours.

Fuel-Saving and Cost-Effective

The engine uses an optimized injection pattern that adjusts injection volume and timing with great precision. As a result, the WP12 burns fuel more completely and lowers waste. Its minimum fuel consumption rate can reach 192 g/kW·h, which reduces daily operating cost and supports long-distance trips. In addition, the simple and clear fuel system design makes routine service easier and helps keep operating cost predictable.

Smooth, Quiet, and Cleaner Operation

With multi-stage injection—such as pilot and post injection—the engine reduces noise and vibration compared with traditional mechanical systems. At the same time, its water-cooled exhaust manifold and pipe help control engine-room temperature during long voyages. Moreover, the WP12 meets IMO Tier II, China Stage I, and China Stage II emission rules, offering cleaner and more stable performance for many types of vessels.

Practical, Flexible, and Easy to Integrate

The WP12 supports optional LCD smart gauges, flexible control panels, and vibration pads to meet different market needs. In addition, the compact layout, horizontal air filter, and rear-mounted turbocharger help reduce engine height, which makes engine-room arrangement easier. The control unit also supports many input and output signals, so users can integrate the engine into various automation systems. Because of this flexibility, the WP12 fits fishing boats, transport vessels, small engineering boats, and marine generator sets.