Seaworthy Power

GE’s New L250 Inline Diesel Engine

Built by one of the world’s largest manufacturers of medium-speed diesel engines.

Designed to save fuel and meet
EPA Tier 2 emissions standards.



Compact power.

Narrow footprint.
Easy to maintain.

The new L250 diesel engine

GE’s new L250 inline engine offers a streamlined design that is fuel-efficient and delivers continuous power from 1498 to 2330 kw. The L250 is specifically engineered for marine applications with its accessories mounted on the engine for maintenance ease. The L250 offers an average 9% fuel savings when compared to the V228 engine. The L250 is marine-class compliant, meeting U.S. EPA Tier 2 emissions requirements and is upgradeable to Tier 3 requirements — a proactive approach to fuel savings and emissions reduction that is natural to GE. The engine, available in 6- and 8-cylinder models, also offers ease of re-power as its narrow inline footprint takes in mind marine engine room constraints where space is at a premium. The narrower frame uses a similar footprint as competitive engines for minimum design change. GE designed the L250 engine based on the successful V250 engine platform using the Six Sigma Quality design process. Together, with flexible installation and maintenance options, proven parts performance and support from GE’s worldwide distribution network, the L250 offers customers reliability and limited downtime.

L250 Components

Marine class. Inline design.

Sturdy Mainframe

The L250’s mainframe is a rugged one-piece iron casting, which provides excellent vibrationdampening characteristics and long-term stability to minimize line bore distortion. Further strength and rigidity are added by bolting main bearing caps both vertically and horizontally. The lube-oil gallery and passages are cast or drilled into the frame to provide lubrication to all vital engine areas with no pipe or hose connections within the frame, helping eliminate leaks or possible loss of lubrication.


GE-designed and manufactured turbochargers maintain the highest degree of quality and reliability. GE’s in-house development ensures the turbocharger is properly matched to the engine in terms of efficiency, performance and mechanical packaging. Placed on either end of the engine, the exhaust-driven turbochargers feature air-cooled turbine inlet casings to maximize available energy; backswept blade design and improved aerodynamics to achieve high efficiency requirements; uniquely designed inducer to withstand foreign object damage; generous oil-film thickness, allowing the turbocharger to use the engine oil system for lubrication; and thrust surfaces at both the compressor and turbine ends to ensure a large thrustbearing capacity to withstand transient impact loading

Power Assemblies

The L250’s power assemblies are designed to meet the high-pressure demands of the engine while adhering to strict reliability requirements and an easy-to-maintain assembly concept. Unitized cylinder assembly enables quick changeouts and increased engine uptime. Each assembly is mounted directly to the mainframe and includes liner assembly, cylinder head, intake and exhaust valves, valve linkage and a high-pressure fuel-injection pump and nozzle. This design enables excellent flow paths for combustion, lower fuel consumption and reduced emissions

Crankshaft and Engine Drive Train

The crankshaft is press-forged, high-quality alloy steel. Oil passages drilled in the crankshaft allow oil delivery to connecting rod bearings and pistons. A flywheel with ring gear for the starting motor is bolted directly to the crankshaft flange.


Our pistons are ruggedly designed to accommodate the high-peak firing pressure requirements of L250 engines. The pin and skirt components are also designed to yield better piston lubrication and guidance as it travels within the liner. The design helps minimize oil consumption and blow-by as well as lengthen oil life.

Exhaust Manifold

The multi-pipe manifold provides increased transient response and better efficiency under pulse and constant pressure operation. It is modularized with identical piping and bellows sections for all of the immediate cylinder assemblies. The bellows sections help lower the thermal and vibrationinduced stresses on the exhaust system.

Intercooler and Air-Intake Manifold

The L250’s combustion air-intake system includes one intercooler mounted on the mainframe between the turbo outlet and air manifold inlet. This allows for lower fuel consumption, emissions and exhaust temperatures. For servicing, the intercooler can be removed without dismantling other engine components.

One-Piece Liners

The stiff, one-piece, mid-stop liner has an integral external water jacket that removes the possibility of water leaks. An anti-polishing ring provides a durable running surface, improving lube oil consumption and liner life. The top onethird of the liner is cooled.


The camshafts on the L250 are made of sectional carbon steel forgings joined by dowel-bolted flanges, a design that simplifies component removal and replacement. Individual sections of the camshaft, rather than the entire camshaft, can be serviced or replaced.

Connecting Rod Assembly

The forged-steel connecting rods are exceptionally strong and exhibit high stiffness, which is beneficial during the engine’s lifetime. Large bearing widths with optimized oil grooves also help improve oilfilm thickness and pressure, allowing for optimum performance and lower friction losses.

Advanced EFI

Designed for greater efficiency at varying speeds and loads, the L250’s electronic fuel injection features precise fuel control, increased pressure capability and refined timing. Optimization of the cam profile, injection start, injection volumes and flows, and control algorithms have produced a relatively simple system, proven reliable through extensive validation.

L250 engine specifications

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the Wabtec L250 MDA – Inline Diesel Marine Engine

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