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Cummins/Onan QSK78-G12 Generator Set

The Cummins/Onan QSK78-G12 is a 2750 kW (3438 kVA) diesel standby generator set powered by a Cummins/Onan QSK78-G12 engine. It operates at 60 Hz.

2750 kW
Standby
78.0 L
Displacement
1
Document types

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Specifications

Fueldiesel
Frequency60.0 Hz
Standby power2750 kW
Standby kVA3438
Prime power2500 kW

Engine

Cummins/Onan QSK78-G12
Displacement78.0 L
Rated speed1800 rpm

Service intervals

2
ItemActionHoursMonthsNotes
valve clearanceCheck2000 hrB-Series (4BT3.3): valve clearance checks not required for 2000 hours, twice the industry standard
engine overhaulOther20000 hrQSK23-Series: expected life cycle to 20,000 hours before first overhaul

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What size generator is the Cummins/Onan QSK78-G12?

The Cummins/Onan QSK78-G12 is rated 2750 kW standby (3438.0 kVA).

Which engine powers the Cummins/Onan QSK78-G12?

The Cummins/Onan QSK78-G12 is powered by the Cummins/Onan QSK78-G12 engine.

What kind of fuel does the Cummins/Onan QSK78-G12 run on?

The Cummins/Onan QSK78-G12 runs on diesel.

What is the prime power rating of the Cummins/Onan QSK78-G12?

The Cummins/Onan QSK78-G12 is rated 2500 kW prime (3125 kVA), against 2750 kW standby.

Available documents

Reference — CUMMINS-GENERATOR-ENGINES-CATALOG (Cummins/Onan)

This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.