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Home›Engines›Cummins/Onan 4BTAA3.3-G12

Cummins/Onan 4BTAA3.3-G12 Engine Engine

The Cummins/Onan 4BTAA3.3-G12 is a 4-cylinder turbocharged and charge after-cooled engine rated at 1800 rpm, producing up to 74 kW. It powers generator sets from Cummins/Onan, including the C40D6R and C60D6.

Also known as: Cummins 4BTAA3.3-G12

Part of the Cummins/Onan 4BTAA3.3 engine family — 7 variants share parts & fitment.

4
Cylinders
1800 rpm
Rated speed
74 kW
Gross power

Engine specifications

Cylinders4
AspirationTurbocharged and charge after-cooled
Rated speed1800 rpm
Gross power74 kW

Generator sets powered by this engine

2
Cummins/Onan C40D6RCummins/Onan C60D6

Common problems

5
  • Under frequency shutdown 81 u
  • Over frequency shutdown/warning 81 o
  • Low AC voltage shutdown 27
  • High Current warning/shutdown 51
  • High AC voltage shutdown 59

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan 4BTAA3.3-G12.

Common questions

Which generators use the Cummins/Onan 4BTAA3.3-G12 engine?

The Cummins/Onan 4BTAA3.3-G12 powers 2 generator set(s), including Cummins/Onan C40D6R, Cummins/Onan C60D6.

What is a common problem with the Cummins/Onan 4BTAA3.3-G12 engine?

A commonly reported issue on generators using the Cummins/Onan 4BTAA3.3-G12 is: Under frequency shutdown.