Cat G3306 Engine

Engine Type
Inline 6-cylinder, 4-stroke
Spark-ignited natural gas engine
Industrial / stationary duty
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
Natural gas
Can also be configured for:

Field gas

Digester gas (with derate)

LPG (special setup)
Can also be configured for:
Field gas
Field gas
Digester gas (with derate)
Digester gas (with derate)
LPG (special setup)
LPG (special setup)
Compression Ratio
Typically 9.0:1 – 10.5:1 (fuel dependent)
Ignition System
Magneto or electronic ignition
Magneto or electronic ignition
Spark plugs (6)
Spark plugs (6)
Cooling System
Jacket-water cooled
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)