Wellhead compression and artificial lift applications require reliability and durability not found in every small natural gas engine. For dependable operations and world class support, you need the Cummins G8.3 – a high-performance natural gas engine that shares the proven heritage of the Cummins C Series diesel engines and many of the same heavy-duty components. You can depend on the G8.3 to keep maintenance costs down and the gas flowing. Every day.

Features & Benefits

Designed for the oil and gas market, the G8.3 delivers exceptional dependability and low cost of operation.

Base Engine – Most major components, including block, crank, cam, gears and liners are common with the proven C series diesel.

Emissions – The G8.3 has catalyst ratings available to allow the engine to be operated as a rich burn engine and can be customer equipped with an AFR and catalyst to meet NSPS emissions requirements.

Air Handling – Naturally aspirated design delivers reliable performance and life.

Fuel System – Impco carburetor provides stable operation and fuel tracking through all load ranges.

Speed Control – Adjustable governor provides precise and stable rpm control under all load conditions.

Ignition System – Altronic CD1 integral electronic ignition system. Easily accessible spark plug location and single coil per cylinder for lower maintenance costs.

Lubrication System – High-capacity oil pan and combination full-flow and bypass oil filter reduces maintenance costs and extend service intervals.

Warranty – Cummins one year, unlimited hours. Backed by a worldwide distributor network.



Standard Equipment

Air Inlet System

• Factory installed heavy duty air cleaner

Cooling System

• Gear driven jacket water pump
• Thermostat controlled jacket water circuit
• Coolant filter for added corrosion protection
• Auxiliary coolant pump optional for compressor cooling

Exhaust System

• Tuned dry manifold for optimal exhaust flow

Fuel System

• Impco carburetor
• Maxitrol regulator

Speed Control System

• Belt-driven mechanical governor
• Electronic governor optional

Ignition System

• Altronic CD1 integral electronic ignition system
• Altronic III Shield ignition optional

Lube Oil System

• Crankcase breather
• High capacity oil pan for extended oil drain intervals
• Combination full flow and bypass oil filter

Safety Shutoff Protection

• Electronic fuel valve

Mounting Arrangement

• Four point mounting
• Lift provisions on engine

Flywheels and Flywheel Housings

• Flywheel housing – SAE #3 Cast-iron, machined to accommodate starter mounting
• Flywheel SAE # 3
• SAE #2 and SAE #1 FW/FH options available

Electrical System

• 24-volt alternator

Starting System

• 24-volt starter
• Gas starter optional

Power Take-Off

• Front crankshaft pulley
• Front stub shaft optional