NAICS 333618 Quarterly Industry Report
Other Engine Equipment Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 333618Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report covers NAICS 333618 (Other Engine Equipment Manufacturing) using the 2022 North American Industry Classification System. Data sources include the U.S. Census Bureau[5] NAICS classification, Bureau of Labor Statistics[6] manufacturing employment data, and SBA size standard tables. Content addresses industry structure, product scope, and market dynamics for establishments primarily engaged in manufacturing engines and engine equipment for non-automotive applications.
Industry Snapshot
Key metrics for the other engine equipment manufacturing industry.
Industry Definition & Overview
Other Engine Equipment Manufacturing (NAICS 333618) encompasses establishments primarily engaged in manufacturing internal combustion engines and other engine equipment not classified elsewhere. Products include gasoline, diesel, and dual-fuel engines for non-automotive applications; outboard motors; governors and speed controls for engines and turbines; and engine parts and accessories. Per the Census Bureau[5], this classification covers engines designed for marine, industrial, construction, agricultural, and power generation applications distinct from motor vehicle engines.
Manufacturing processes combine precision machining of engine blocks and cylinder heads, crankshaft forging and finishing, fuel injection system assembly, and electronic engine management integration. Engine testing requires dynamometer facilities that measure power output, fuel consumption, and emissions performance across operating ranges. Products must meet EPA emission standards, Coast Guard marine safety requirements, and various industry-specific performance certifications. Skilled machinists, engine calibration engineers, and emissions compliance specialists comprise the core technical workforce.
Geographic distribution follows established manufacturing centers with engine production heritage. Facilities concentrate in the Midwest, Southeast, and along coastal regions for marine engine production. According to BLS data[6], manufacturing employment distributes across states with machining infrastructure and supply chain access. Customer markets span marine propulsion, standby power generation, construction equipment, agricultural machinery, lawn and garden equipment, and industrial pump and compressor drive applications.
What's Included in This Industry
- Gasoline engines for non-automotive applications
- Diesel engines for industrial and marine use
- Outboard motors and stern drive units
- Natural gas and dual-fuel engines
- Engine governors and speed control devices
- Turbine governors and speed regulators
- Small engines for lawn, garden, and utility equipment
- Engine parts including pistons, rings, and valves
- Stationary engine generator drive units
- Engine testing and calibration services
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Machinery Manufacturing | 333 |
| Industry Group | Engine, Turbine, and Power Transmission Equipment Manufacturing | 3336 |
| NAICS Industry | Engine, Turbine, and Power Transmission Equipment Manufacturing | 33361 |
| National Industry | Other Engine Equipment Manufacturing | 333618 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 333611 | Turbine and Turbine Generator Set Units Manufacturing | Manufactures turbines and turbine generator sets sharing rotating equipment engineering expertise and power generation market focus with engine equipment producers in the same industry group |
| 333612 | Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing | Produces speed changers, gearboxes, and industrial drives that couple with engines manufactured under NAICS 333618 for marine propulsion, generator drive, and industrial equipment applications |
| 333613 | Mechanical Power Transmission Equipment Manufacturing | Manufactures bearings, couplings, and clutches integrated into engine-driven equipment systems as mechanical power transmission components connecting engines to driven machinery |
| 333912 | Air and Gas Compressor Manufacturing | Produces air and gas compressors that use engines manufactured under NAICS 333618 as prime movers for portable and stationary compressed air applications |
| 333111 | Farm Machinery and Equipment Manufacturing | Manufactures farm machinery and equipment that integrates diesel and gasoline engines from NAICS 333618 as power sources for tractors, harvesters, and agricultural implements |
| 333120 | Construction Machinery Manufacturing | Produces construction machinery including excavators, loaders, and dozers that depend on diesel engines from NAICS 333618 manufacturers as primary power units |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Indiana | 9.5% | 24 |
| 2 | California | 9.1% | 23 |
| 3 | Michigan | 8.7% | 22 |
| 4 | Wisconsin | 6.8% | 17 |
| 5 | Ohio | 6.0% | 15 |
| 6 | Texas | 4.4% | 11 |
| 7 | Florida | 4.4% | 11 |
| 8 | Illinois | 4.4% | 11 |
| 9 | North Carolina | 4.0% | 10 |
| 10 | South Carolina | 3.2% | 8 |
% Of Establishments
0%
10%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
56
Total SBA Loans
$34.9M
Total Loan Volume
$623K
Average Loan Size
12 yrs
Average Loan Term
10.25%
Average Interest Rate
232
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The Small Business Administration[7] sets the size standard for NAICS 333618 at 1,000 employees. Firms averaging 1,000 or fewer employees over the preceding 12 months qualify as small businesses for SBA loan programs, federal contracting set-asides, and small business certifications. This elevated threshold reflects the capital intensity of engine manufacturing, where machining centers, dynamometer facilities, and emissions testing laboratories characterize competitive operations. Eligible businesses can access SBA 7(a) loans[8] for working capital, equipment, and acquisition financing, while 504 loans[9] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | Bank of America, National Association | 8 | $21.5M | $2.7M |
| 2 | Oxford Bank | 16 | $6.2M | $388K |
| 3 | U.S. Bank, National Association | 8 | $2.8M | $350K |
| 4 | The Huntington National Bank | 8 | $2.4M | $300K |
| 5 | CenTrust Bank, A Division of SmartBiz Bank National Associat | 8 | $1.2M | $150K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 333618?
NAICS 333618 classifies establishments primarily engaged in manufacturing internal combustion engines for non-automotive use, outboard motors, engine governors, and engine parts. The Census Bureau[5] distinguishes this from motor vehicle engines (NAICS 336310), turbines (NAICS 333611), and aircraft engines (NAICS 336412).
How is the engine equipment manufacturing industry structured?
Large manufacturers produce broad lines of diesel and gasoline engines for multiple end markets through global distribution networks. Mid-size firms specialize in specific applications such as marine outboard motors, standby generator engines, or small utility engines. Smaller manufacturers produce custom engine packages, remanufactured engines, and specialty components for niche industrial applications.
What is the SBA size standard for engine equipment manufacturers?
The SBA sets the size standard at 1,000 employees for NAICS 333618. Firms at or below this threshold qualify as small businesses for federal contracting preferences and SBA lending programs. Details appear in the SBA size standards table[7].
What NAICS codes are closely related to engine equipment manufacturing?
NAICS 333611 covers turbines in the same industry group. NAICS 333612 covers gearboxes coupled with engines. Smaller 333912 covers compressors driven by engines. These adjacent codes reflect the interconnected power generation and industrial equipment supply chain where engines serve as prime movers.
What industries depend on engine equipment manufacturers?
Marine vessel operators purchase outboard and inboard engines for propulsion. Construction companies use diesel engines in portable equipment. Per BLS data[6], industrial employment across construction, agriculture, and marine sectors depends on engine equipment from NAICS 333618 manufacturers.
What activities does NAICS 333618 include?
Covered products include gasoline and diesel engines for non-automotive use, outboard motors, natural gas engines, engine governors, turbine governors, small engines, and engine parts. Manufacturing activities span precision machining, crankshaft forging, fuel system assembly, and dynamometer testing. Excluded items include motor vehicle engines (NAICS 336310), turbines (NAICS 333611), and aircraft engines (NAICS 336412).
Are engine equipment manufacturers eligible for SBA loans?
Yes, manufacturers meeting the 1,000-employee threshold qualify for SBA 7(a) loans, 504 loans, and federal contracting set-asides. The SBA funding programs[10] page details eligibility for manufacturing businesses seeking capital for machining centers, test cells, and working capital.
Where is engine equipment manufacturing concentrated in the United States?
Wisconsin, Indiana, and Illinois host notable engine manufacturing operations built on longstanding industrial heritage. Marine engine production concentrates in coastal and Great Lakes states. According to BLS employment data[6], engine and power transmission equipment manufacturing employment clusters in Midwest states with deep machining and foundry capabilities.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]Census Bureau census.gov
- [6]BLS data bls.gov
- [7]Small Business Administration sba.gov
- [8]SBA 7(a) loans sba.gov
- [9]504 loans sba.gov
- [10]SBA funding programs sba.gov
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