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Home›Engines›Cummins/Onan QSK50-G5 NR2

Cummins/Onan QSK50-G5 NR2 Engine Engine

The Cummins/Onan QSK50-G5 NR2 is a 16-cylinder turbocharged and low temperature aftercooled engine rated at 1800 rpm, producing up to 1470 kW. It powers generator sets from Cummins/Onan, including the 14RCA/L. It holds 235 L (62.1 gal) of oil.

Also known as: Cummins Inc. QSK50-G5 NR2

16
Cylinders
1800 rpm
Rated speed
1470 kW
Gross power
235.0 L
Oil capacity

Engine specifications

Oil capacity235.0 L
Cylinders16
AspirationTurbocharged and low temperature aftercooled
Rated speed1800 rpm
Gross power1470 kW

Generator sets powered by this engine

1
Cummins/Onan 14RCA/L

Common problems

3
  • If the engine fails to start at first try
    Cause: Inhibitor oil used at the factory may have fouled the spark plugs
    Fix: Remove the plugs, clean in a suitable solvent, dry thoroughly and install
  • Heavy exhaust smoke when the engirie is first started
    Cause: Caused by the inhibitor oil
  • Continuous generator overloading may cause high operating temperatures that can damage the windings
    Fix: Keep the load within the nameplate rating

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan QSK50-G5 NR2.

Common questions

What is the oil capacity of the Cummins/Onan QSK50-G5 NR2?

The Cummins/Onan QSK50-G5 NR2 engine has an oil capacity of 235.0 liters.

Which generators use the Cummins/Onan QSK50-G5 NR2 engine?

The Cummins/Onan QSK50-G5 NR2 powers 1 generator set(s), including Cummins/Onan 14RCA/L.

What is a common problem with the Cummins/Onan QSK50-G5 NR2 engine?

A commonly reported issue on generators using the Cummins/Onan QSK50-G5 NR2 is: If the engine fails to start at first try. Cause: Inhibitor oil used at the factory may have fouled the spark plugs. Fix: Remove the plugs, clean in a suitable solvent, dry thoroughly and install.