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Home›Engines›Cummins/Onan 6CTAA8.3-G3

Cummins/Onan 6CTAA8.3-G3 Engine Engine

The Cummins/Onan 6CTAA8.3-G3 is a 8.3 L 6-cylinder turbocharged and cac engine rated at 1500 rpm. It powers generator sets from Cummins/Onan, including the DGFC. It holds 23.8 L (6.3 gal) of oil and 25.7 L (6.8 gal) of coolant.

Also known as: Cummins 6CTAA8.3-G3

Part of the Cummins/Onan 6CTAA8.3 engine family — 3 variants share parts & fitment.

8.3 L
Displacement
6
Cylinders
1500 rpm
Rated speed
23.8 L
Oil capacity

Engine specifications

Oil capacity23.8 L
Coolant capacity25.7 L
Displacement8.3 L
Cylinders6
AspirationTurbocharged and CAC
Rated speed1500 rpm

Generator sets powered by this engine

1
Cummins/Onan DGFC

Common problems

15
  • Over Current 1471
  • Low Coolant Level 197
  • Weak Battery 1442
  • Under Frequency 1448
  • Too Long in Idle 2342
  • Status Indicators are not functioning properly.
    Fix: Check the status indicators for any visible damage or loose connections. If the issue persists, refer to the Fault Code Table for further troubleshooting.
  • Speed/Hz Match 1469
  • Speed Signal Lost 121
  • Shutdown After Battle Short 1123
  • Short Circuit 1445
  • Remote Emergency Stop 1434
  • Pre-Low Oil Pressure Sensor 143
  • Pre-High Cool Temp 146
  • Power Down Failure 1417
  • Overspeed 234

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan 6CTAA8.3-G3.

Parts cataloged across the Cummins/Onan 6CTAA8.3 family

22
Part #DescriptionCategory
503-0446Clamp, Hoseclamp
503-1134Clamp, Hoseclamp
405-5832Door, Housingdoor
406-0831Hinge, Doorhinge
155-3150-04Muffler, Criticalmuffler
155-3164-05Muffler, Criticalmuffler
502-0047Nipple, Pipe (1/4)nipple
821-6003-02Screw, Cap - Hex Headother_service
928-0502Bother_service
928-0506other_service
960-0504Aother_service
960-0505other_service
960-12other_service
405-5908Panel, Side - Radiator Housingpanel
405-5917Panel, End - Roofpanel
155-3164-01Pipe, Exhaustpipe
405-5744Post, Housing - Centerpost
405-5916Post, Corner - Housingpost
800-2072Screw, Cap - Hex Head (M8 x 1.25 x 100)screw
A028Z105Sender, Low Coolantsender
526-0451Washer, Flat - Stainless Steel (M8)washer
319-2653Window, Control (If Equipped)window

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

Common questions

What is the oil capacity of the Cummins/Onan 6CTAA8.3-G3?

The Cummins/Onan 6CTAA8.3-G3 engine has an oil capacity of 23.8 liters.

What is the displacement of the Cummins/Onan 6CTAA8.3-G3?

The Cummins/Onan 6CTAA8.3-G3 has a displacement of 8.3 liters with 6 cylinders.

Which generators use the Cummins/Onan 6CTAA8.3-G3 engine?

The Cummins/Onan 6CTAA8.3-G3 powers 1 generator set(s), including Cummins/Onan DGFC.

What is a common problem with the Cummins/Onan 6CTAA8.3-G3 engine?

A commonly reported issue on generators using the Cummins/Onan 6CTAA8.3-G3 is: Over Current.