New CAT Equipment

C9.3 ACERT Tier 4i/Stage IIIB Engine

Cat C9.3 ACERT engines are the ideal solution for your demanding operations in the oilfield. Decades of field operation and intense research and development allow Cat C9.3 ACERT engines to deliver excellent performance with low operating costs and emissions. This is an ideal engine for applications that require Tier 4 Interim or EU Stage IIIB emissions certifications. Equipment powered by C9.3 ACERT engines includes workover rigs, pump skids, acidizing units, cementing units, coil tubing units, and hydraulic power units. Cat engines are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat® C9.3 ACERT Industrial Diesel Engine. Ratings: 224-261 bkW (300-350 bhp) @ 1800-2200 rpm meet U.S. EPA Tier 4 Interim, EU Stage IIIB emission standards. This information about Emissions describes the particular rating's emissions technology. For more information about emissions certification, please contact your local Cat dealer.

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Product Specs

General Specifications

Minimum Rating 300 BHP
Maximum Rating 350 BHP
Governor and Protection Electronic (ADEM A4)
RPM 2200 r/min
Aspiration Turbocharged-Aftercooled
Displacement 567.5 in³
Flywheel and Flywheel Housing SAE 1 or SAE 2
Flywheel Teeth 113 (SAE 1)
Rotation from Flywheel End Counterclockwise
Stroke 5.87 in
Bore 4.53 in


Emissions US EPA Tier 4 Interim, EU Stage IIIB


Length 45.3 in
Width 32.6 in
Height 44.21 in
Weight 1950 lb

Capacity for Liquids

Lube Oil System - Refill 31.7 gal (US)
Cooling System 23.5 gal (US)