Loading...
U.S. imports of spark-ignition reciprocating & rotary internal combustion piston engines, nesoi (HS 840790) totaled $79.9M in July 2026, traded with 25 countries.
Importers of Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines, NESOI paid $11.9M in duties in July 2026 — an effective duty rate of 16% on $74.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines, NESOI imports of $79.9M in July 2026 ran 44% above the year-to-date monthly average of $55.4M.
Last updated: July 2026 dataHeading 840790 serves as the residual category for spark-ignition piston engines not covered by the aircraft, marine, or vehicle-propulsion headings — encompassing engines for lawn and garden equipment, generators, construction machinery, and other non-road applications. Its twelve 10-digit lines are organized primarily by power output, with dedicated lines for agricultural and horticultural machinery (8407901010, 8407901050, 8407901060) and a gas-engine line (8407909010). Japan and Thailand lead US supply, with China also a major source; Chinese-origin engines in this category may be subject to Section 301 tariffs, a significant cost factor for importers of small engine-powered outdoor power equipment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
733 shipments/mo
Headings 840731–840734 are restricted to engines for propulsion of Chapter 87 vehicles (road vehicles, motorcycles, tractors, etc.). Heading 840790 captures all other spark-ignition piston engines — including those powering lawn mowers, chainsaws, portable generators, and construction equipment — that are not designed for vehicle propulsion. The intended application and the equipment's own tariff classification are the key distinguishing factors.
The heading's lines cascade through several watt-based breakpoints: under 746 W (8407909020), under 4,476 W (8407909030/8407909040), 4,476 W to 18.65 kW (8407909060), and over 18.65 kW (8407909080), with parallel agricultural-use lines at similar thresholds. Importers must obtain rated power output in watts from the manufacturer's technical data sheet and apply it consistently across all entries to avoid classification discrepancies.
HSChapter 84
Supplier Network
Get discovered by U.S. importers searching for HS 840790 — Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines, NESOI. Be the first supplier listed.
Subheading 3 of 8 in heading 8407
Subheading 840790 · $79.9M of $1.0B
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8407909040 | Sp-Ig Int Comb Pst Eng, NESOI, Less Than 4,476 W | $12.7M | 20.68% | 92.52% | $2.6M |
| 8407909010 | Spark-Ign Internal Combust Piston Type Gas Engines | $10.7M | 24.58% | 94.80% | $2.6M |
| 8407909060 | Sp-Ig Int Comb Pst Eng, NESOI, 4476-18.65 Kw | $9.2M | 37.10% | 96.85% | $3.4M |
| 8407901010 | Spk-Ig Pst Eng, Ag, Hort, Mc N/E 37.3kw | $7.8M | 18.32% | 100.00% | $1.4M |
| 8407909080 | Sp-Ig Int Comb Pst Eng, NESOI, Exceeding 18.65kw | $7.4M | 24.58% | 99.46% | $1.8M |
| 8407909020 | Sp-Ig Int Comb Pst Eng, NESOI, Less Than 746 W | $366K | 13.95% | 99.10% | $51K |
| 8407901020 | Sp-Ig Pst Eng, NESOI,/Ag,/Ho,/Mc Gt 4,476 W | $310K | 13.35% | 32.59% | $41K |
| 8407901080 | Sp-Igint Comb Pst Eng Esc Air-Col,NESOI,Gt 37.3kw | $248K | 23.80% | 100.00% | $59K |
| 8407901060 | Sp-Ig Pst Typ Air-Col Eng, NESOI, Ag, Ho, Mach | $37K | 39.20% | 100.00% | $15K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$79.9MYoY · Pro
Exports
$28.7MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Germany and China together supply 55% of it.
customs district
destination
entry
rate provision · imports
3.3% enters free of duty; the effective duty rate is 14.94%.