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Cummins/Onan QSK50-G5 Generator Set

The Cummins/Onan QSK50-G5 is a 1500 kW (1875 kVA) diesel standby generator set powered by a Cummins/Onan QSK50-G5 engine. It operates at 60 Hz. It holds about 234.7 L (62.0 gal) of oil and 401 L (105.9 gal) of coolant.

1500 kW
Standby
50.0 L
Displacement
234.7 L
Oil capacity
2
Document types

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Specifications

Fueldiesel
Frequency60.0 Hz
Standby power1500 kW
Standby kVA1875
Prime power1365 kW
Oil capacity234.7 L

Engine

Cummins/Onan QSK50-G5
Oil capacity234.7 L
Coolant capacity401.0 L
Displacement50.0 L
AspirationTurbocharged, After-cooled
Rated speed1800 rpm

Filters for the Cummins/Onan QSK50-G5

1

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.

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

SystemFilterDescriptionCross-references
Fuel / water separatorP550849Fuel Filter, Water Separator CartridgeCUMMINS 3944901S, NAPA 3763, BALDWIN PF7928, DAVCO 102526 FridayParts $20.90 KuduParts $39.00

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 is the power rating of the Cummins/Onan QSK50-G5?

The Cummins/Onan QSK50-G5 is rated 1500 kW standby (1875.0 kVA).

What engine is in the Cummins/Onan QSK50-G5?

The Cummins/Onan QSK50-G5 is powered by the Cummins/Onan QSK50-G5 engine.

What kind of fuel does the Cummins/Onan QSK50-G5 run on?

The Cummins/Onan QSK50-G5 runs on diesel.

How much oil does the Cummins/Onan QSK50-G5 take?

The Cummins/Onan QSK50-G5 engine in the Cummins/Onan QSK50-G5 has an oil capacity of 234.7 liters.

What is the cooling system capacity of the Cummins/Onan QSK50-G5?

The Cummins/Onan QSK50-G5 cooling system holds 401 liters (105.9 US gallons) for the engine, per the manufacturer specification sheet.

What is the continuous rating of the Cummins/Onan QSK50-G5?

The Cummins/Onan QSK50-G5 is rated 1365 kW prime (1706 kVA), against 1500 kW standby.

Available documents

Spec sheet — 0070824 (Cummins/Onan)Spec sheet — QSK50-G5 (Cummins/Onan)Reference — CUMMINS-GENERATOR-ENGINES-CATALOG (Cummins/Onan)

This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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