Waukesha P9390G Engine – Specifications

(Dresser / Waukesha Engine Division)

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Identification (from Nameplate)

• Manufacturer: Waukesha (Dresser)

• Engine Model: P9390G

• Engine Type: Industrial gas engine

• Bore × Stroke: 9-3/8 in × 8-1/2 in

• Specification No.: 262500

• Spec Code: 975-155

• Serial Number: 401601

• Manufacturer Location: Waukesha, Wisconsin, USA

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General Engine Data

• Configuration: Inline 6-cylinder

• Cycle: 4-stroke

• Fuel Type: Natural gas (field gas capable with proper setup)

• Aspiration: Naturally aspirated (some variants turbocharged depending on build)

• Cooling: Jacket water cooled

• Duty Rating: Continuous industrial / oilfield service

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Displacement

• Per Cylinder: ~586 in³

• Total Displacement: ~3,520 in³ (≈57.7 L)

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Performance (Typical for P9390 Series)

(Exact rating depends on spec number & governor speed)

• Rated Power: 600 – 700 HP

• Rated Speed: 900 – 1,200 RPM

• Peak Torque: High torque at low RPM (designed for pump/compressor duty)

• Governor Speed: (field-set per application; not legible on tag)

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Fuel & Ignition

• Fuel System: Carbureted natural gas

• Ignition: Magneto or electronic ignition (application dependent)

• Air/Fuel Control: Mec