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G3306Non-Current

G3306 Industrial Gas Engine

Overview

Cat® G3306 Industrial Gas Engine. Ratings: 108-157 bkW (145-211 bhp) @ 1800 rpm are NSPS site compliant capable with customer-supplied aftertreatment. Some ratings also have standard emission settings available for export only. For specific emission information, please consult your local Cat Dealer.

Specifications

Units: 
Bore 121 mm (4.75 in)
Stroke 152 mm (6.0 in)
Displacement 10.5 L (638 in³)
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Benefits & Features

Engine Design

    • Proven reliability and durability
    • Ability to burn a wide spectrum of gaseous fuels
    • Robust diesel strength design prolongs life and lowers owning and operating costs
    • Broad operating speed range

Full Range of Attachments

Large variety of factory-installed engine attachments reduces packaging time

Quality

Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

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  February 16, 2026

Specifications

Units: 
Power Rating
Minimum Power —
Maximum Power —
Frequency 1800 rpm
General
Bore 121 mm (4.75 in)
Stroke 152 mm (6.0 in)
Displacement 10.5 L (638 in³)
Engine Configuration Engine - Continuous
Aspiration Turbocharged Aftercooled (TA)
Engine Dimensions - Approximate
Length 1539 mm (60 in)
Height 1261 mm (50 in)
Width 978 mm (38 in)
Weight - Net Dry 948 kg (2090 lb)

Benefits & Features

Engine Design

    • Proven reliability and durability
    • Ability to burn a wide spectrum of gaseous fuels
    • Robust diesel strength design prolongs life and lowers owning and operating costs
    • Broad operating speed range

Full Range of Attachments

Large variety of factory-installed engine attachments reduces packaging time

Quality

Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

    • Scheduled maintenance, including SOSSM sample
    • Customer Support Agreements (CSA)
    • Caterpillar Extended Service Coverage (ESC)
    • Superior dealer service network
    • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

World-class Product Support Offered Through Global Cat Dealer Network

    • Scheduled maintenance, including SOSSM sample
    • Customer Support Agreements (CSA)
    • Caterpillar Extended Service Coverage (ESC)
    • Superior dealer service network
    • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

Standard Equipment

  • Air Inlet System
    • Air cleaner
    • Air cleaner rain cap
    • Service indicator
  • Control System
    • Hydra-mechanical governor
  • Cooling System
    • Thermostats and housing
    • Jacket water pump
    • Aftercooler water pump
    • Aftercooler core
  • Exhaust System
    • Watercooled exhaust manifolds
    • Dry exhaust elbow
  • Flywheels & Flywheel Housings
    • SAE No. 1 flywheel
    • SAE No. 1 flywheel housing
    • SAE standard rotation
  • Fuel System
    • Gas pressure regulator
    • Natural gas carburetor
  • Ignition System
    • Altronic V ignition system
  • Instrumentation
    • Service meter
  • Lube System
    • Crankcase breather — top mounted
    • Oil cooler
    • Oil filter
    • Oil pan — full sump
    • Oil filler and dipstick
  • Mounting System
    • Engine supports
  • Protection System
    • Shutoffs
  • General
    • Paint — Cat yellow
    • Crankshaft vibration damper and pulley
    • Lifting eyes

Optional Equipment

  • Charging System
    • Battery chargers
    • Charging alternators
    • Ammeter gauge
    • Ammeter gauge and wiring
  • Control System
    • PSG Woodward governor
    • Vernier and positive locking control
  • Cooling System
    • ATAAC conversion
    • Aftercooler group
    • Expansion tank
    • Heat exchanger and expansion tank
    • Radiator
    • Blower fan for customer supplied radiators
    • Suction fan for customer supplied radiators
    • Fan drives for customer supplied radiators
    • Fan adapter for customer supplied radiators
    • Belt tightener
  • Exhaust System
    • Flexible fittings
    • Elbows
    • Flanges
    • Pipes
    • Rain caps
    • Mufflers
  • Fuel System
    • Low pressure gas conversion
    • Fuel filter
  • Ignition System
    • Altronic III
    • CSA shielded ignition
    • Wiring harness
    • Dual timing
  • Instrumentation
    • Gauges and instrument panels
  • Lube System
    • Lubricating oil
  • Mounting System
    • Vibration isolators
  • Power Take-Offs
    • Auxiliary drive pulleys and auxiliary pump
    • Enclosed clutch and clutch support
    • Flywheel stub shaft
    • Front stub shaft
  • Protection System
    • Mechanical shutoff
    • Gas valves
  • Starting System
    • Air starting motor
    • Air pressure regulator
    • Air silencer
    • Electric starting motors with start switch installed/ shipped loose
    • Starting aids
    • Battery sets
  • General
    • Tool set

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