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HSChapter 84
U.S. imports of inboard & inboard/outdrive engines for marine propulsion (HS 840729) totaled $1.4M in April 2026, traded with 9 countries.
Importers of Inboard & Inboard/Outdrive Engines for Marine Propulsion paid $11K in duties in April 2026 — an effective duty rate of 10% on $110K in dutiable value, based on actual customs collections rather than the published tariff schedule. Inboard & Inboard/Outdrive Engines for Marine Propulsion imports of $1.4M in April 2026 ran 24% above the year-to-date monthly average of $1.2M.
Last updated: April 2026 dataSpark-ignition inboard and stern-drive (inboard/outdrive) marine engines fall under heading 840729, with five 10-digit lines covering inboard/outdrive configurations (8407290010), sub-746 W units (8407290020), engines in the 746 W–18.65 kW range (8407290030), other inboard configurations (8407290040), and dedicated inboard-drive engines (8407290050). Canada and Germany lead US supply, reflecting both cross-border OEM sourcing and European performance marine engine brands. Unlike outboard engines, inboard units are often installed at the boatbuilder level, so commercial importers are frequently vessel manufacturers rather than aftermarket distributors.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
An inboard/outdrive (stern-drive) configuration has the engine mounted inside the hull but drives through a steerable outdrive unit at the transom, classified under 8407290010. A pure inboard engine with a fixed shaft and rudder system falls under 8407290050. The drive configuration — not engine displacement — is the primary classification criterion, so technical documentation from the manufacturer specifying the drive type is essential.
Canada is the leading supplier of inboard marine engines to the US. Engines that qualify as originating goods under USMCA rules of origin — meeting applicable tariff-shift and regional value content requirements — are eligible for preferential duty treatment. Importers must obtain and retain a valid USMCA certification of origin to claim the preference at entry.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8407290010 | SPK-IGN REC OR ROT INT COM PST ENG,MAR,IN/OUTBOARD | $1.1M | -- | -- |
| 8407290040 | SPK-IGN REC OR ROT INT COM PST ENG,MARI, IN/INBORD | $355K | 10.00% | $8K |
| 8407290030 | SPIG REC/RT INT COM PST,MARN,INBD(746W-18.65KW) | $28K | 10.00% | $3K |
| 8407290020 | SPK-IGN REC/ROT INT COM PST ENG,MARN,LT 746W | $10K | -- | -- |
SPK-IGN REC OR ROT INT COM PST ENG,MAR,IN/OUTBOARD
SPK-IGN REC OR ROT INT COM PST ENG,MARI, IN/INBORD
SPIG REC/RT INT COM PST,MARN,INBD(746W-18.65KW)
SPK-IGN REC/ROT INT COM PST ENG,MARN,LT 746W
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8407290010 | SPK-IGN REC OR ROT INT COM PST ENG,MAR,IN/OUTDRIVE | $6.0M |
| 8407290050 | INBOARD ENG WITH INBOARD DRIVE F MARINE PROPULSION | $1.6M |
SPK-IGN REC OR ROT INT COM PST ENG,MAR,IN/OUTDRIVE
583 no
INBOARD ENG WITH INBOARD DRIVE F MARINE PROPULSION
185 no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| Port | Imports | Exports | Balance |
|---|---|---|---|
| JACKSONVILLE, FL | -- | $2.1M | +$2.1M |
| CHARLESTON, SC | -- | $1.7M | +$1.7M |
| PORT HURON, MI | $1.1M | $272K | -$827K |