Cat C7.1

Commercial propulsion engines

About the Cat C7.1

The C7.1 marine propulsion engine is ideal for recreational boating applications, specifically smaller vessels and motoryachts ranging from 25 -60 feet in size. The engine features a common rail fuel system enabling optimum combustion and low emissions. The engines provide noticeably quiet operation due to reduced combustion noise through advanced electronic control. Additionally, no visible smoke is emitted from the C7.1 engines during operation.

Specifications

Ratings

Power Range

298 bkW - 373 bkW (400 bhp - 500 bhp)

Engine Specifications

Rotation from Flywheel End	Counterclockwise
Speed Range	2900 rpm
Bore	4.13 in
Emissions	EPA Tier 3 Recreational, IMO II, RCD 2016
Stroke	5.31 in
Aspiration	Turbocharged, aftercooled
Displacement	427.16 in³
Configuration	In-line 6, 4-Stroke-Cycle Diesel

Dimensions & Weights

Width - Engine	31.4 in
Height	34.5 in
Engine Dry Weight - Approximate	1653 lb
Length - Engine	54.9 in

Features

Reliability & Durability

Superior response time and acceleration for better maneuverability and safety; Grid heater for improved cold weather starting; Electrical advantages with 12V or 24V electrical system; Highest standard paint quality

Easy to use

Compatible with Cat® Displays to monitor all vessel operations; Available engine-mounted display panel with start, stop, and engine diagnostic; Single access point improves serviceability; Wiring harnesses with a woven cover provide more attractive serviceable compenents; gplink ready for remote monitoring

Environment friendly

No visible smoke on start up or underway; The common rail fuel system enables optimum combustion and low emissions; Reduced combustion noise through advanced electronic control; Closed crankcase ventilation system improves engine room cleanliness; Electronically controlled supercharger provides industry-leading torque and throttle response at low speeds, while maintaining fuel efficiency at high speeds