Caterpillar Marine Engine – 5CPXM78.1EN1 - 2005

The Caterpillar 5CPXM78.1EN1 is a powerful marine diesel engine engineered for high-output applications and regulated under the 2005 EPA Category 1 marine engine standards. Featuring electronic control and electronic unit injection (EUI) technology, this engine achieves a maximum advertised power of 2525 kW (3386 HP) at a rated speed of 1925 RPM. Each cylinder delivers a displacement of 4.31 liters, and total engine displacement varies with the number of cylinders. With intake and exhaust valve lash settings of 0.5 mm and 1.0 mm respectively, the engine is fine-tuned for reliable cold starts and precise combustion control. It is compliant with IMO NOx limits, emitting 10.1 g/kW-hr, and offers a useful service life of up to 10 years or 10,000 operational hours. The engine is optimized for heavy-duty marine propulsion systems, where consistent performance and emissions compliance are crucial.

Specifications:

– Manufacturer: Caterpillar
– Model: 5CPXM78.1EN1
– Engine Type: Marine Diesel Engine
– Emission Standard: EPA 2005 Category 1 Marine Engine
– IMO Compliance: Yes
– Fuel Type: Diesel
– Fuel Injection System: Electronic Unit Injection (EUI)
– Ignition Timing: Electronically Controlled
– Displacement per Cylinder: 4.31 L
– Total Displacement: Dependent on Cylinder Count
– Max. Advertised Power: 2525 kW (3386 HP)
– Max. Rated Speed: 1925 RPM
– Max. Low Idle Speed: 1925 RPM
– Valve Lash (Cold):
 – Intake: 0.5 mm
 – Exhaust: 1.0 mm
– NOx Emissions: 10.1 g/kW-hr
– Useful Life: 10 Years or 10,000 Operating Hours
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