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Cummins/Onan QSX15-G4 Generator Set

The Cummins/Onan QSX15-G4 is a 366 kW (457 kVA) diesel standby generator set powered by a Cummins/Onan QSX15-G4 engine. It is available at 24 V, 50 Hz. It holds about 91 L (24.0 gal) of oil and 42 L (11.1 gal) of coolant, with a maximum ambient rating of 55 °C. The set measures 2269×1332×1669 mm (89.3×52.4×65.7 in) and weighs about 1658 kg (3655 lb).

366 kW
Standby
15.0 L
Displacement
91.0 L
Oil capacity
2
Document types

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Specifications

Fueldiesel
Frequency50.0 Hz
Standby power366 kW
Standby kVA457
Prime power327 kW
Oil capacity91.0 L
Alternator35 amps
Voltage options24 V
Coolant capacity42.0 L
Max ambient55 °C
Dimensions (L×W×H)2269×1332×1669 mm
Dry weight1658 kg

Engine

Cummins/Onan QSX15-G4
Displacement15.0 L
Rated speed1500 rpm

Filters for the Cummins/Onan QSX15-G4

6

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

SystemFilterDescriptionCross-references
Oil filterP559000Lube Filter, Spin-On Full FlowCUMMINS 2101869, CUMMINS 2882674, NAPA 400107, BALDWIN BD7154 KuduParts $17.00 FridayParts $36.00
Oil filterP550949Lube Filter, Spin-On Full FlowCUMMINS 2882673, CUMMINS 4331005, NAPA 400107, BALDWIN B7322 KuduParts $67.00 FridayParts $69.59
Fuel filterP763995Fuel Filter, Spin-OnIRISBUS 0504112123, ASTRA 132347, DAF TRP 1533849, NEW HOLLAND 1931108 buy
Fuel / water separatorP551048Fuel Filter, Water Separator Spin-On Twist&DrainCUMMINS 3104081, BALDWIN BF9920, HYUNDAI 11ND70010, WIRTGEN 2111170 buy
Fuel / water separatorP551047Fuel Filter, Water Separator Spin-On Twist&DrainCUMMINS 3101871, CUMMINS 3101872, NAPA 3423, BALDWIN BF1277-SPS KuduParts $51.00

Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:

SystemFilterDescriptionCross-references
Coolant filterP552073Coolant Filter, Spin-On Sca PlusCUMMINS 209605, CUMMINS 299082, NAPA 4073, IMPERIAL 04WF2073 buy

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 QSX15-G4?

The Cummins/Onan QSX15-G4 is rated 366 kW standby (457.0 kVA).

What engine does the Cummins/Onan QSX15-G4 use?

The Cummins/Onan QSX15-G4 is powered by the Cummins/Onan QSX15-G4 engine.

What kind of fuel does the Cummins/Onan QSX15-G4 run on?

The Cummins/Onan QSX15-G4 runs on diesel.

What is the cooling system capacity of the Cummins/Onan QSX15-G4?

The Cummins/Onan QSX15-G4 cooling system holds 42 liters (11.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the oil capacity of the Cummins/Onan QSX15-G4?

The Cummins/Onan QSX15-G4 has an engine oil capacity of 91 liters (96.2 US quarts), per the manufacturer specification sheet.

What is the continuous rating of the Cummins/Onan QSX15-G4?

The Cummins/Onan QSX15-G4 is rated 327 kW prime (409 kVA), against 366 kW standby.

How much does the Cummins/Onan QSX15-G4 weigh?

The Cummins/Onan QSX15-G4 has a dry weight of 1658 kg (3655 lb).

What voltage does the Cummins/Onan QSX15-G4 produce?

The Cummins/Onan QSX15-G4 is offered in 24 V.

Which alternator is fitted to the Cummins/Onan QSX15-G4?

The Cummins/Onan QSX15-G4 uses a 35 amps alternator.

Fuel consumption

RatingLoadL/hgal/h
Prime100%107.328.4
Standby100%94.124.9

Available documents

Spec sheet — QSX15-G4 (Cummins/Onan)Reference — CUMMINS-GENERATOR-ENGINES-CATALOG (Cummins/Onan)

This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.