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.
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.
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.
Available heat exchanger and keel cooled configurations help simplify integration across different hull designs, operating environments and vessel requirements.
Meets U.S. EPA Tier 3, IMO II, EU IWW, EU Stage V and China II standards, helping fleets operate across regulated waterways and global workboat applications.
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.
Electronic diagnostics and fault logging monitor engine and transmission speed, temperature and pressure, helping crews support proactive fleet management and uptime.
Engine Specifications
Application
Workboat
Speed Range
1500 - 2100 rpm
Emissions
U.S. EPA Tier 3 Commercial, IMO II, EU IWW, EU Stage V, China II
