GE L250

 

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.

 

Seaworthy power

GE’s new L250 inline diesel engine

 

 

Fuel-efficient.

Emissions-compliant.

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.

Turbocharger

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

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.

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.

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

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.

Camshafts

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.

Pistons

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.

 

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

Marinsa International Inc, 12250 sw 133 Ct Miami fl  33186 

Main Phone. 305-252-0118 Fax. 305-252-2202 

E-mailmiami@marinsa.com

 

Any questions?