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Cummins/Onan QSB7 Generator Set

The Cummins/Onan QSB7 is a 174 kW (233 kVA) Diesel standby generator set powered by a Cummins/Onan QSB7-G9 engine. It is available at 12 V, 50 Hz. It holds about 18.9 L (5.0 gal) of oil and 36 L (9.5 gal) of coolant, with a maximum ambient rating of 50 °C. The set measures 1688×862×1190 mm (66.5×33.9×46.9 in) and weighs about 585 kg (1290 lb).

174 kW
Standby
6.7 L
Displacement
18.9 L
Oil capacity
4
Document types

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Typical fuel consumption for 170–175 kW Diesel generators →

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Specifications

FuelDiesel
Frequency50.0 Hz
Standby power174 kW
Standby kVA233
Prime power151 kW
EmissionsEU Stage IIIA,EPA Tier 4i
Oil capacity18.9 L
Alternator70 amps
Voltage options12 V
Coolant capacity36 L
Max ambient[50, 60] °C
Dimensions (L×W×H)1688×862×1190 mm
Dry weight585 kg

Engine

Cummins/Onan QSB7-G9
Displacement6.7 L
AspirationTurbocharged, Charge Air Cooled and EGR

Filters for the Cummins/Onan QSB7-G9

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.

SystemFilterDescriptionCross-references
Oil filterP550428Lube Filter, Spin-On Full FlowCUMMINS 3937144, CUMMINS 3937736, NAPA 7182, TEREX 0704970120 KuduParts $61.00 FridayParts $62.99

Filters & service parts

model family
ItemSpecCapacityPart #Interval
Air filter—1000 hr
Fuel filter—500 hr
Oil filter—1000 hr
Battery—
Belt—1000 hr
Coolant26.95 L—
Coolant filter—
Oil18.9 L—
Spark plug—500 hr

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.

Common questions

How many kW is the Cummins/Onan QSB7?

The Cummins/Onan QSB7 is rated 174 kW standby (233.0 kVA).

What engine does the Cummins/Onan QSB7 use?

The Cummins/Onan QSB7 is powered by the Cummins/Onan QSB7-G9 engine.

What kind of fuel does the Cummins/Onan QSB7 run on?

The Cummins/Onan QSB7 runs on Diesel.

How much coolant does the Cummins/Onan QSB7 hold?

The Cummins/Onan QSB7 cooling system holds 36 liters (9.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the oil capacity of the Cummins/Onan QSB7?

The Cummins/Onan QSB7 has an engine oil capacity of 18.9 liters (20.0 US quarts), per the manufacturer specification sheet.

What is the continuous rating of the Cummins/Onan QSB7?

The Cummins/Onan QSB7 is rated 151 kW prime (169 kVA), against 174 kW standby.

What is the dry weight of the Cummins/Onan QSB7?

The Cummins/Onan QSB7 has a dry weight of 585 kg (1289 lb).

What voltage does the Cummins/Onan QSB7 produce?

The Cummins/Onan QSB7 is offered in 12 V.

What alternator comes on the Cummins/Onan QSB7?

The Cummins/Onan QSB7 uses a 70 amps alternator.

Parts

3model family
Part #DescriptionQtySystem
4915973Alternator ManualAlternator Amazon eBay
0908-0110-00Health and Safety (Diesel Generator Sets)1Service part / kit Amazon eBay $12.00
4919115CM2250 wiring test lead and harness repair kit1Service part / kit buy

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Continuous power100%47.012.4
Prime power100%51.013.5
Standby100%58.015.4
Continuous100%42.011.0
Prime25%16.04.3
Prime50%27.07.2
Prime75%40.010.5
Prime100%58.015.4
Standby25%13.03.4
Standby50%24.06.3
Standby75%36.09.4
Standby100%51.013.4

Available documents

Engine spec — 0032900 (Cummins/Onan)Engine spec — 0043688 (Cummins/Onan)Spec sheet — 0070819 (Cummins/Onan)Spec sheet — 0070820 (Cummins/Onan)Spec sheet — QSB7-G3 (Cummins/Onan)Spec sheet — QSB7-G4 (Cummins/Onan)Spec sheet — QSB7-G4 0Spec sheet — QSB7-G5 (Cummins/Onan)Spec sheet — QSB7-G6 (Cummins/Onan)Spec sheet — QSB7-G9 (Cummins/Onan)Reference — Schedule Technical2012 (Cummins/Onan)Reference — rental-generator-sets-rating-cards-north-america-50-60hz-2025-aug (Cummins/Onan)Service manual — 908-0604 Cummins QSB7-G3 Engine Installation Manual (4-2007) (Cummins/Onan)Service manual — 908-0615 Cummins QSB7-G5 Engine Installation Manual (12-2009) (Cummins/Onan)Service manual — 908-0617 Cummins QSB7-G5 3.3 Engine Installation Manual (12-2009) (Cummins/Onan)

This page was generated from the 15 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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