Products - C Gas Plus Cummins Westport Homepage
Cummins Westport Asia
Natural Gas Engine for Truck and Bus

Following six years of reliable performance, with over 5,000 engines currently in service worldwide, the C Gas Plus engine is being replaced by the ISL G. Certified to U.S. EPA 2010 & CARB emissions levels and available in ratings from 250 to 320 hp, the ISL G combines Cummins proven Exhaust Gas Recirculation (EGR) technology with a Three-Way Catalyst (TWC) to offer improved efficiency and lower costs.

The C Gas Plus 250 hp rating is available in North America to the end of 2007. For Euro-certified markets, the C Gas Plus certified to Euro IV is available.

Customers with the C Gas Plus engine will continue to be supported by the Cummins distributor and service network.

Building on the rugged, reliable design of Cummins diesel engines, the Cummins Westport C Gas Plus engine is a six-cylinder Lean-Burn Spark-Ignited natural gas vehicle engine that delivers from 250 to 280 hp with ultra-low emissions.  It provides excellent torque, high fuel efficiency and reliable, robust performance.

For information on tax incentives like the Highway and Energy Bill, please visit our Incentives page.

photo of C Gas Plus

transit vehicles
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Clean Air Solutions for Transit


wastehaulers
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Clean Air Solutions for Vocational Trucks


medium-duty trucks
FEATURES
  • Ultra-low emissions - certified to:
    • U.S. EPA 2007 standard
    • U.S. EPA 2007 transit bus standard
    • CARB optional Low-NOx and Low-PM
    • Euro III
  • Proven "Plus" technology
  • Reliable - easy to maintain
  • Electronic controls and diagnostics
  • Economical - low-cost natural gas
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Information Flyer

(753 kb)


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SPECIFICATIONS

Advertised Horsepower 250-280 hp 186-205 kW
Peak Torque 660-850 lb-ft 895-1152 N•m
Governed Speed 2400 rpm  
Clutch Engagement Torque 410 lb-ft 555 N•m
Number of Cylinders 6  
Compression Ratio 10:1  
Oil System Capacity 6.3 U.S. gal 23.9 L
Coolant Capacity 10.7 U.S. qts 10.1 L
Net Weight w/ Std Accessories, Dry 1,330 lbs 604 kg
Fuel Type CNG/LNG
Methane number 65 or greater

Cummins Westport engines can accept a wide range of natural gas fuel compositions. Use our Fuel Performance Specification Calculator to ensure compatibility.


RATINGS

Model Advertised HP
HP (kW)
Peak Torque
lb-ft (N·m)
Spec Sheet
CG-250* 250 (186) @ 2400 RPM 750 (1017) @ 1400 RPM download PDF
CG-250* 250 (186) @ 2400 RPM 660 (895) @ 1400 RPM download PDF
* The 250 hp rating is available in North America until 2008, when it will be replaced by the ISL G, with ratings from 250–320 hp.