Cat G3306 Engine

Caterpillar G3306 – Engine Specifications

Engine Type

• Inline 6-cylinder, 4-stroke

• Spark-ignited natural gas engine

• Industrial / stationary duty

Displacement

• 10.5 L (638 in³)

Bore x Stroke

• 130.2 mm x 127 mm

• 5.12 in x 5.00 in

Rated Power (typical ranges)

• 200 – 350 HP

• Common ratings:

  • 250–300 HP @ 1800 RPM

  • 300–350 HP @ 1200–1800 RPM (depends on compression & fuel)

Rated Speed

• 1200 RPM (generator duty)

• 1800 RPM (industrial / pump duty)

Aspiration

• Naturally aspirated or turbocharged
  (most G3306 oilfield units are NA)

Fuel Type

• Natural gas

• Can also be configured for:

  • Field gas

  • Digester gas (with derate)

  • LPG (special setup)

Compression Ratio

• Typically 9.0:1 – 10.5:1 (fuel dependent)

Ignition System

• Magneto or electronic ignition

• Spark plugs (6)

Cooling System

• Jacket-water cooled

• Thermostat ~ 180–190°F

Oil Capacity

• ~ 7–8 gallons (26–30 L)

Dry Weight

• Approx. 2,300–2,500 lb
  (1,040–1,135 kg)