Generator Engine DatabaseTechnical specifications and datasheets

Generac Generator Engines

39 engines in the database

This database lists 39 Generac generator engines ranging from 22 kWe to 1,000 kWe, covering gas (natural gas, biogas and CNG/LNG) power. 33 are current production models and 6 are discontinued or archived. Cylinder configurations include Inline-4 Naturally Aspirated, L6 Turbocharged Aftercooled, Inline-4 Turbocharged and V8 Naturally Aspirated. Emissions certifications span U.S. EPA Stationary and Unregulated. 34 models link to an official manufacturer datasheet or manual.

Generac generator engine selection guide

Use this Generac hub to shortlist generator engines by electrical output, fuel type, emissions standard, datasheet coverage, and 50 Hz or 60 Hz rating. For a complete generator set, the engine choice should be checked together with alternator sizing, controller features, enclosure layout, voltage, cooling, exhaust, fuel system, and local compliance requirements.

Model	Output	Fuel	Emissions
SG1000	1,000 kWe	Natural Gas	U.S. EPA Stationary
SG750	750 kWe	Natural Gas	Unregulated
SG625	625 kWe	Natural Gas	U.S. EPA Stationary
SG500	500 kWe	Natural Gas	Unregulated
SG450	450 kWe	Natural Gas	Unregulated
SG400	400 kWe	Natural Gas	U.S. EPA Stationary
SG350	350 kWe	Natural Gas	U.S. EPA Stationary
SG300	300 kWe	Natural Gas	U.S. EPA Stationary

Common applications

-Generac standby generator sets
-Generac prime-power generator packages
-Generac industrial power modules
-Generac gas generator sets and CHP projects
-Generac data center, mining, oil and gas, and utility-scale packages
-Generac compact commercial and telecom standby sets

Common searches

Generac generatorGenerac generatorsGenerac generator enginesGenerac gas engines

Related generator brands

Baudouin generator engines Jenbacher generator engines Hino generator engines JCB generator engines

Need a Generac generator package?

Haifeng Machinery can help select the engine, alternator, controller, enclosure, voltage, cooling package, and compliance path for a complete generator set.

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In Production

Generac

QT025A

QuietSource

Standby25kWe31.25kVA@1800rpm

2.4L4-cylL4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

RG02224

Protector QS

Standby22kWe27.5kVA@1800rpm

2.4L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

RG02724

Protector QS

Standby25kWe31.3kVA@1800rpm

2.4L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

RG03224

Protector QS

Standby32kWe40kVA@1800rpm

2.4L4-cylInline-4 TurbochargedU.S. EPA StationaryMade in United States

Generac

RG03824

Protector QS

Standby38.6kWm38kWe47.5kVA@1800rpm

2.4L4-cylInline-4 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

RG04845

Protector

Standby48kWe60kVA@1800rpm

4.5L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG035

Industrial Gaseous

Standby35kWe43.8kVA@1800rpm

4.5L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG040

Industrial Gaseous

Standby45.5kWm40kWe50kVA@1800rpm

4.43L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG045

Industrial Gaseous

Standby51.5kWm45kWe56.3kVA@1800rpm

4.43L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG050NA

Industrial Gaseous

Standby50kWe62.5kVA@1800rpm

4.5L4-cylInline-4 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG050T

Industrial Gaseous

Standby50kWe62.5kVA@1800rpm

4.5L4-cylInline-4 TurbochargedU.S. EPA StationaryMade in United States

Generac

SG060

Industrial Gaseous

Standby73.1kWm60kWe75kVA@1800rpm

4.43L4-cylInline-4 TurbochargedU.S. EPA StationaryMade in United States

Generac

SG070

Industrial Gaseous

Standby70kWe87.5kVA@1800rpm

4.5L4-cylInline-4 TurbochargedU.S. EPA StationaryMade in United States

Generac

SG080

Industrial Gaseous

Standby91kWm80kWe100kVA@1800rpm

4.43L4-cylInline-4 TurbochargedU.S. EPA StationaryMade in United States

Generac

SG080 (9.0L)

Industrial Gaseous

Standby91kWm80kWe100kVA@1800rpm

8.9L8-cylV8 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG100 (8.8L)

Industrial Gaseous

Standby100kWe125kVA@1800rpm

8.8L8-cylV8 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG100 (9.0L)

Industrial Gaseous

Standby114.8kWm100kWe125kVA@1800rpm

8.9L8-cylV8 Naturally AspiratedU.S. EPA StationaryMade in United States

Generac

SG1000

SG Series

Standby1094kWm1000kWe1250kVA@1800rpm

49.03L12-cylV12 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG130 (8.8L)

Industrial Gaseous

Standby130kWe162.5kVA@1800rpm

8.8L8-cylV8 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG150

Industrial Gaseous

Standby150kWe187.5kVA@1800rpm

8.8L8-cylV8 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG150 (9.0L)

SG Series

Standby150kWe187.5kVA@1800rpm

8.9L8-cylV8 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG175

Industrial Gaseous

Standby175kWe218.8kVA@1800rpm

14.2L6-cylInline-6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG200

Industrial Gaseous

Standby200kWe250kVA@1800rpm

14.2L6-cylInline-6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG230

Industrial Gaseous

Standby230kWe287.5kVA@1800rpm

14.2L6-cylInline-6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG250

SG Series

Standby280kWm250kWe313kVA@1800rpm

14.2L6-cylL6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG275

SG Series

Standby305kWm275kWe343.8kVA@1800rpm

14.2L6-cylL6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG300

SG Series

Standby334kWm300kWe375kVA@1800rpm

14.2L6-cylL6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG350

Industrial Gaseous

Standby350kWe437.5kVA@1800rpm

21.9L12-cylV12 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG400

Industrial Gaseous

Standby400kWe500kVA@1800rpm

21.9L12-cylV12 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG450

SG/MG

Standby450kWe562.5kVA@1800rpm

21.9L12-cylV12UnregulatedMade in United States

Generac

SG500

SG/MG

Standby500kWe625kVA@1800rpm

25.8L12-cylV12UnregulatedMade in United States

Generac

SG625

Industrial Gaseous

Standby625kWe781.3kVA@1800rpm

33.9L12-cylV12 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Generac

SG750

SG/MG

Standby750kWe937.5kVA@1800rpm

33.9L12-cylV12UnregulatedMade in United States

Discontinued / Archived

Generac

13.3L Hino Gas

Legacy Liquid-Cooled Gas

Production Discontinued

13.3L6-cylL6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Discontinued 2014

Generac

4.2L V6 Gas

Legacy Liquid-Cooled Gas

Production Discontinued

4.2L6-cylV6 Naturally AspiratedU.S. EPA StationaryMade in United States

Discontinued 2012

Generac

5.4L V8 Gas

Legacy Liquid-Cooled Gas

Production Discontinued

5.4L8-cylV8 Naturally AspiratedU.S. EPA StationaryMade in United States

Discontinued 2020

Generac

6.8L V10 Gas

Legacy Liquid-Cooled Gas

Production Discontinued

6.8L10-cylV10 Naturally AspiratedU.S. EPA StationaryMade in United States

Discontinued 2022

Generac

G12.9L G20

Legacy Liquid-Cooled Gas

Production Discontinued

12.9L6-cylL6 Turbocharged AftercooledU.S. EPA StationaryMade in United States

Discontinued 2022

Generac

MGG100M

Magnum Mobile Gaseous

Production Discontinued

8.9L8-cylV8 Naturally AspiratedU.S. EPA StationaryMade in United States

About Generac generator engines

Models: 39
Power range: 22–1,000 kWe
Fuel: Gas
With datasheets: 34

Selection notes for buyers

Start with duty and output

Shortlist Generac generator engines around 22-1,000 kWe, then compare prime, standby and frequency ratings against the actual load profile.

Check site constraints

Review gas availability, cooling package, emissions rules and service support before treating two similar kWe ratings as interchangeable.

Match the alternator and package

After the engine shortlist is clear, confirm voltage, frequency, alternator frame size and radiator or canopy requirements for the complete generator set.

Use this shortlist in a generator-set project

The model list is a specification starting point. Haifeng Machinery can help confirm the engine rating, alternator match, cooling system and emissions requirement for standby, prime or continuous-duty projects.

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Frequently asked questions

What is the power range of Generac generator engines?

Generac generator engines in this database range from approximately 22 kWe to 1,000 kWe of electrical output, across prime and standby ratings at 50 Hz and 60 Hz.

How many Generac generator engines are listed?

There are 39 Generac generator engines in the database — 33 current production models and 6 discontinued or archived.

Are datasheets available for Generac generator engines?

Yes — 34 of the 39 Generac generator engines link to an official manufacturer datasheet or manual on their detail page.

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