2022 NAICS national industry in sector 31-33 Manufacturing
333618 Other Engine Equipment Manufacturing
NAICS 333618 is the US industry code for other engine equipment manufacturing. This U.S.
- Code
- 333618 (2022 NAICS)
- Title
- Other Engine Equipment Manufacturing
- Part of
- Engine, Turbine, and Power Transmission Equipment Manufacturing
- SBA small business limit
- Up to 1,500 employees
- Closest UK SIC
- 27900, 28110, 29100, 30910 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This U.S. industry comprises establishments primarily engaged in manufacturing internal combustion engines (except automotive gasoline and aircraft).
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing gasoline motor vehicle engines and motor vehicle transmissions are classified in Industry Group 3363, Motor Vehicle Parts Manufacturing.
- Manufacturing gasoline aircraft engines and aircraft transmissions are classified in Industry 33641, Aerospace Product and Parts Manufacturing.
- Manufacturing turbine and turbine generator set units are classified in U.S. Industry 333611, Turbine and Turbine Generator Set Units Manufacturing.
- Manufacturing speed changers and industrial high-speed drives and gears are classified in U.S. Industry 333612, Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing.
- Manufacturing mechanical power transmission equipment (except motor vehicle and aircraft) are classified in U.S. Industry 333613, Mechanical Power Transmission Equipment Manufacturing.
Activities listed under 333618
The Census index assigns these 17 activities to this code. If your business matches one, this is your code.
- Diesel and semidiesel engines manufacturing
- Electric outboard motors manufacturing
- Engines, diesel and semidiesel, manufacturing
- Engines, diesel locomotive, manufacturing
- Engines, internal combustion (except aircraft, nondiesel automotive), manufacturing
- Engines, natural gas, manufacturing
- Gasoline engines (except aircraft, automotive, truck) manufacturing
- Governors, diesel engine, manufacturing
- Governors, gasoline engine (except automotive), manufacturing
- Internal combustion engines (except aircraft, nondiesel automotive, nondiesel truck) manufacturing
- Internal combustion engines for hybrid drive systems (except automotive) manufacturing
- Locomotive diesel engines manufacturing
- Marine engines manufacturing
- Motors, outboard, manufacturing
- Natural gas engines manufacturing
- Outboard motors manufacturing
- Semidiesel engines manufacturing
SBA size standard for 333618
To count as a small business for SBA loans and federal contracts under NAICS 333618, your business (including affiliates) must not exceed 1,500 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2790, 2811, 2910, 3091), so treat them as a starting point and check the definition.
- 27900Manufacture of other electrical equipmentUK SIC
- 28110Manufacture of engines and turbines, except aircraft, vehicle and cycle enginesUK SIC
- 29100Manufacture of motor vehiclesUK SIC
- 30910Manufacture of motorcyclesUK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.