G5.9 & GTA5.9 Gas Compression Applications

Power 49 - 116 hp
37 - 87 kW


Oil & Gas Engines Gas Compression


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 G5.9 and GTA5.9 – high-performance natural gas engines that share the proven heritage of the Cummins B Series diesel engines and many of the same heavy-duty components. You can depend on the G5.9 and GTA5.9 to keep maintenance costs down and the gas flowing. Every day.

General Specifications
Inline 6-Cylinder, 4-Cycle, Natural Gas

Bore 4.02 in (102 mm)
Stroke 4.72 in (120 mm)
Displacement 5.9 L (359 cubic in)
Engine Power* 49-116 hp (37-87 kW)
Compression ratio NA: 10.5:1, TA: 8.5:1
Aspiration Naturally aspirated or turbocharged and aftercooled
Exhaust Type Dry or watercooled manifold
Weight** 1070 lb (485kg)
Lube oil capacity 6.6 gal (25.0 L)
Rotation Counterclockwise

* Rating dependent
** Weight is approximate and varies with options.

Model Rating Compression Ratio Emissions
G5.9 99 hp (74 kW) @ 2200 rpm 8.5:1 (1)
G5.9 84 hp (63 kW) @ 1800 rpm 8.5:1 (1)
G5.9 49 hp (37 kW) @ 1800 rpm 8.5:1 (1)
GTA5.9 116 hp (87 kW) @ 1800 rpm 10.5:1 Export Only

(1) CUSTOMER-COMPLIANT UPGRADEABLE – This engine is capable of operating with a Three-Way Catalyst at this rating. It is the responsibility of the owner/operator to upgrade the engine with an air/fuel ratio controller and a Three Way Catalyst capable of meeting the SI NSPS regulations. The owner/operator is required to conduct site compliance testing and submit documentation per the EPA SI NSPS requirements.

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