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Home›Engines›Cummins/Onan N14-G2

Cummins/Onan N14-G2 Engine Engine

The Cummins/Onan N14-G2 is an engine. It powers generator sets from Cummins/Onan, including the DFE, DQBA and DQBB.

Also known as: Cummins N14-G2

Part of the Cummins/Onan N14 engine family — 3 variants share parts & fitment.

Engine specifications

Generator sets powered by this engine

3
Cummins/Onan DFECummins/Onan DQBACummins/Onan DQBB

Common problems

15
  • Warning, Shutdown, and Non-Automatic lamps are not lit. Digital display shows main menu or selected menu.
    Cause: Indicates all engine systems are normal. No corrective action required
  • Warning lamp lights. 231
    Fix: Indicates battery voltage exceeds 32 VDC. Contact an authorized service center.
  • Shutdown lamp lights. 250
    Fix: Indicates PCC memory error. Data corruption of critical operating parameters. Contact an authorized service center.
  • Non-Automatic lamp flashes.
    Cause: Indicates Run/Off/Auto switch is not in the Auto position. This will prevent automatic starting if an automatic transfer switch is used.
    Fix: Move the Run/Off/Auto switch to the Auto position for automatic operation.
  • No AC output voltage.
    Fix: Contact an authorized service center.
  • Engine shuts down and will not crank. 102
    Cause: Indicates local or remote Emergency Stop.
    Fix: To reset the local Emergency Stop button : Pull the button out or turn the switch clockwise (button with arrow) and allow it to pop out. Move the Run/Off/Auto switch to Off. Press the Reset switch. Select Run or Auto, as required.
  • Engine continues to operate at reduced RPM.
    Cause: Indicates that the engine is operating in idle mode. When the set is operating in the RUN mode, grounding the engine idle input causes generator build-up to be inhibited and the engine to be governed at 800 RPM.
  • Control does not power up when the Run/Off/Auto switch is set to Run or the Self Test switch is pressed.
    Cause: There is no DC power to the control.
    Fix: A. Check for battery disconnected, discharged, or improperly connected. b. Fuse F1 (20A/32V, Type 3AG) may be open. Replace with the same type. (Fuse is mounted near engine starter/solenoid, see Figure 4-2). Contact an authorized service center.
  • Engine starts from generator control panel but will not start automatically or from a remote panel.
    Cause: (Note: The Run/Off/Auto switch must be in the Auto position for automatic or remote starting). Check the control wiring between the remote switch and the PCC. Contact an authorized service center.
  • Over Current 1471
  • Low AC Voltage 2331
  • High AC Voltage 2358
  • Weak Battery 1442
  • Under Frequency 1448
  • Too Long in Idle 2342

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan N14-G2.

Parts cataloged across the Cummins/Onan N14 family

111
Part #DescriptionCategory
3163196torque wrench adapteradapter
256837Air compressor air cleaner element (Cummins Two-Cylinder Only)air_filter
3822524Use on v-belts ( 3/8 to 7/8) and v-ribbed belts with 5 ribs or less.belt
0300-4623-09DFCB (600V)current_transformer
0300-4623-10DFCC (600V)current_transformer
0300-4623-24DFCB BR (0-480V)current_transformer
0300-4623-27DFCC BR (0-480V)current_transformer
1920090ECMecm
19801556ECMecm
49200083ECMecm
19801564CENTRY™ STC Actuator Lead Wireelectronic_fuel_control_valve
19200074Engine Harness Adaptor Cableengine_harness_adaptor_cable
19800109Engine Speed Sensorengine_speed_sensor
19801560Fuel Blockfuel_block
50121-43698Fuel Shutoff Valvefuel_filter
19801565Fuel Pressure Sensing Linefuel_pressure_sensing_line
1920096Fuel Pump Gear Pumpfuel_pump
08600043sea water pump gasketgasket
08600042sea water pump housinghousing
08600119sea water pump impellerimpeller
3822697Injector Pullerinjector
3823348STC Injector Tappet Retaining Tool (IBC method)injector
3823579CELECT™ Injector Pullerinjector
3824653STC Injector Pullerinjector
M-3070113Injector Sleeveinjector
M-3072485Injector Plunger Linkinjector
M-3078226Injector Plunger Linkinjector
19801567Main Engine Harnessmain_engine_harness
3318853CE 1 122-0755 3313279 CE 2 122-0526 3304232 CE 1 13 14 15 16 505- 503- 503- 504- 505oil_filter
00160044Engine Modelother_service
19100001Idle Shutdown Featureother_service
19100064Automotive Governor with Droopother_service
19160001Automotive Governorother_service
19200073WARNING and STOP lights in the cab panelother_service
19200075Maintenance monitor data (Cumulative Data, Trip Data, Idle Data, PTO Data)other_service
19200084Fan Clutch 2 Enableother_service
1920086Fuel Shutoff Valveother_service
1920089Cooling Plateother_service
1920091Engine Wiring Harness (actuator amp connector)other_service
1920092OEM Wiring Harnessother_service
1920093Engine Mounted Service Tool Datalinkother_service
1920094Fuel Inother_service
1920095Fuel Outother_service
19400220Engine Brake Solenoid Valveother_service
19601595ADVANTAGE™other_service
19801598ADVANTAGE™ POINTother_service
19801602Transient Black Smoke Controlother_service
19801603CENTRY™ Plusother_service
19801610N14 Section 1 - Operating Instructionsother_service
3376592Inch Pound Torque Wrenchother_service
3823097High-temperature Anti-Seize Compoundother_service
3823461Chip Removal Toolother_service
49100029Fan Clutch 2 Enableother_service
49200053PTO Setother_service
49601601Torque Signalother_service
49801597Power Outputother_service
49801599Low Speed High Speedother_service
49801603AFC CONTROLLED FUELother_service
C2800Fleetguard® refractometerother_service
M-3066736Valve Spring Housingother_service
M-3066738Valve Springother_service
M-3067426Valve Spring Retainerother_service
M-3070184Cup Retainerother_service
M-3071967Filter Screenother_service
M-3072486Link Retainerother_service
M-3072819– Spring Housing Spacerother_service
M-3072821– Spring Guideother_service
M-3072822– Socket Set Screwother_service
M-3072823Spring Housing Spacer Assemblyother_service
M-3073244Cup Retainerother_service
M-3075613Socket Head Cap Screwother_service
M-3076068Ball Checkother_service
M-3076071Spray Tip Assemblyother_service
M-3076256Wiring Harnessother_service
M-3080766Coupling Retainerother_service
M-3081342Plunger Couplingother_service
M-3081371Upper Plunger Spring – Femaleother_service
M-3081388Upper Plunger Spring – Maleother_service
M-3083863Plunger Couplingother_service
M-3087552Upper Plunger – Maleother_service
M-3087791Spray Tip Assemblyother_service
M-3088175Spray Tip Assemblyother_service
M-3409978Spray Tip Assemblyother_service
M-3411340Plunger Coupling Springother_service
M-3411388Spray Tip Assemblyother_service
M-3411690Spray Tip Assemblyother_service
M-3411694Spray Tip Assemblyother_service
M-3411711Plunger and Barrel – Maleother_service
M-3411775Spring Retainerother_service
M-3609852Spray Tip Assemblyother_service
M-3609855Spray Tip Assemblyother_service
M-3609861Spray Tip Assemblyother_service
M-3800419All manufacturer’s names, symbols and descriptions are used for reference only and itother_service
19801568Rail Pressure Sensorrail_pressure_sensor
08500039sea water pump screwscrew
M-3034408Control Valve O-Ringseal
M-3068959Barrel O-Ringseal
M-3070136O-Ring Seal Topseal
M-3070137O-Ring Seal Middleseal
M-3070138O-Ring Seal Bottomseal
M-3075658Solenoid O-Ringseal
M-3080421Sealing Washerseal
1920087Oil Pressure Sensorsensor
1920088Intake Manifold Pressure Sensorsensor
1920097Oil Temperature Sensorsensor
1920098Engine Position Speed Sensor (behind lubricating oil pump)sensor
1920100Coolant Level Sensor (in radiator) - Optionalsensor
1920101Intake Manifold Temperature Sensorsensor
1920102Ambient Air Pressure Sensor (when required)sensor
1920099Coolant Temperature Sensor (in thermostat housing)thermostat
50121-43700Thermostatthermostat

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

Which generators use the Cummins/Onan N14-G2 engine?

The Cummins/Onan N14-G2 powers 3 generator set(s), including Cummins/Onan DFE, Cummins/Onan DQBA, Cummins/Onan DQBB.

What is a common problem with the Cummins/Onan N14-G2 engine?

A commonly reported issue on generators using the Cummins/Onan N14-G2 is: Warning, Shutdown, and Non-Automatic lamps are not lit. Digital display shows main menu or selected menu.. Cause: Indicates all engine systems are normal. No corrective action required.