New CAT Equipment

C7.1 High Performance Propulsion Engine

The C7.1 marine propulsion engineis 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.

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Product Specs


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 inĀ³
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