International
International MaxxForce 9
International/Navistar MaxxForce I-6
International MaxxForce 9 legacy 9.3 L inline-six diesel for Class 7-8 DuraStar, WorkStar and International CXT applications. International source material validates the MaxxForce 9 name, I-6 family, 300-330 hp range, serviceability and rebuild positioning; Navistar later announced production cessation for the proprietary 9/10-liter medium-duty platform by fiscal Q2 2018.
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- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-12
- Package route
- diesel generator sets
- Maximum Mechanical Power
- 246 kW
- Cylinders
- L6
- Displacement
- 9.3 L
- Rated Speed
- 2,200 RPM
International MaxxForce 9 industrial power context
The International MaxxForce 9 is a high-speed industrial diesel engine rated at 246.1 kW mechanical output at 2,200 RPM. It is used in off-road equipment and can support engineered variable-speed power systems, but its maximum power is not a direct 50/60 Hz alternator rating. Verify the drivetrain, power electronics, cooling, and emissions installation with Volvo Penta before specifying a generator package.
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Technical Specifications
| Brand | International |
| Model | MaxxForce 9 |
| Series | International/Navistar MaxxForce I-6 |
| Configuration | Inline-6 wet-sleeve turbocharged diesel |
| Cylinders | 6 |
| Displacement | 9.3 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | EPA 2007/EPA 2010 on-highway legacy |
| Certifications | International 2008 model-year MaxxForce I-6 announcement, International EPA 07/EPA 10 MaxxForce resource archive, Navistar proprietary 9/10-liter production ceased by fiscal Q2 2018 |
| Country of Origin | United States |
| Year Introduced | 2008 |
| Year Discontinued | 2018 |
Frequently asked questions
What is the maximum power output of the International MaxxForce 9?
The International MaxxForce 9 has a maximum mechanical output of 246.1 kW at 2,200 rpm. This is a variable-speed off-road rating, not a fixed-speed generator-set rating.
What fuel does the International MaxxForce 9 use?
The International MaxxForce 9 is a diesel variable-speed industrial engine.
What is the displacement and cylinder configuration of the MaxxForce 9?
The International MaxxForce 9 is an inline-6 (6-cylinder) engine with a displacement of 9.3 L.
What emissions standard does the MaxxForce 9 meet?
The International MaxxForce 9 is certified to EPA 2007/EPA 2010 on-highway legacy emissions standards.
Is the MaxxForce 9 still in production?
No — the International MaxxForce 9 is discontinued (production ended around 2018). Its specifications and datasheets remain archived here for reference.
Is a datasheet available for the MaxxForce 9?
Yes — an official International datasheet for the International MaxxForce 9 can be downloaded from this page.