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C18

Commercial Propulsion Engines

The Cat® C18 commercial propulsion engine is built to deliver reliable, high-output power for workboats operating in demanding marine environments. Its inline 6-cylinder, four-stroke diesel design provides the durability and performance needed for long hours, heavy-duty duty cycles and consistent propulsion. Supported by the global Cat dealer network, the C18 helps keep vessels productive, serviceable and ready for the next job.

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Power Range 454 - 1136 bhp (339 - 847 bkW)

Speed Range 1800 - 2100 rpm

Emissions U.S. EPA Tier 3 Commercial, IMO II, EU Stage V, China II

Aspiration Turbocharged - Aftercooled

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C18

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OVERVIEW

Built for Long Days on the Water

FEATURES & BENEFITS

Power Range

Delivers 454–803 bhp across a wide 1800–2100 rpm operating range, giving workboat operators flexible propulsion performance for changing vessel demands and duty cycles.Po... Read more

Inline 6 Design

The 18.1 L inline 6 diesel platform uses a 145 × 183 mm bore and stroke with turbocharging and separate circuit aftercooling to support sustained commercial output.Inline... Read more

Cooling Options

Available heat exchanger and keel cooled configurations help simplify integration across different hull designs, operating environments and vessel requirements.Cooling Op... Read more

Emissions Compliance

Meets U.S. EPA Tier 3, IMO II, EU Stage V and China II standards, helping fleets operate across regulated waterways and global workboat applications.Emissions ComplianceM... Read more

Compact Footprint

A 73 in 1854 mm engine length and under 4000 lb dry weight help support installation in space constrained workboat engine rooms and repower applications.Compact Footprint... Read more

Smart Monitoring

Electronic diagnostics and fault logging monitor engine and transmission speed, temperature and pressure, helping crews support proactive fleet management and uptime.Smar... Read more

SPECIFICATIONS FOR C18

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Power Rating

Power Range

454 - 1136 bhp (339 - 847 bkW)

Engine Specifications

Speed Range	1800 - 2100 rpm
Emissions	U.S. EPA Tier 3 Commercial, IMO II, EU Stage V, China II
Aspiration	Turbocharged - Aftercooled
Bore	145 mm
Stroke	183 mm
Displacement	18.1 l
Rotation from Flywheel End	Counterclockwise
Configuration	In-line 6, 4-Stroke-Cycle Diesel
Oil Change Interval	250 / 500
Refill Capacity	49 / 68 l
Cooling	Heat Exchanger or Keel Cooled
Governor	Electronic
Flywheel Housing	SAE No. 0 (136 teeth) or SAE No. 1 (113 teeth)
Application	Workboat

Dimensions & Weights

Minimum Dry Weight	1814 kg
Minimum Length	1854 mm
Maximum Length	19312 mm
Minimum Height	1198 mm
Maximum Height	1300 mm
Minimum Width	1134 mm
Maximum Width	1204 mm

Dimensi & Bobot

Aspiration TA

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C18

Commercial Propulsion Engines

C18

OVERVIEW