Product classification

HS code for Inboard marine engine: 8407.29

Engines, for marine propulsion, (other than outboard motors), spark-ignition reciprocating or rotary internal combustion piston engines.

Classification of inboard marine engine under HS 8407.29

Inboard marine engines are classified under HS code 8407.29, which covers spark-ignition reciprocating or rotary internal combustion piston engines specifically designed for marine propulsion, excluding outboard motors. This classification is part of Chapter 84, which deals with mechanical appliances and machinery. To fall under 8407.29, an engine must meet several criteria. First, it must be a spark-ignition engine, which typically uses gasoline (petrol) and spark plugs, as opposed to compression-ignition (diesel) engines found in heading 8408. Second, it must be designed for "marine propulsion," meaning its primary function is to move a vessel through water. Third, it must be an "inboard" engine, which is permanently installed within the hull of the boat. This is distinct from "outboard" motors (8407.21), which are self-contained units that include the engine, propeller, and steering mechanism and are mounted on the transom. The "other" designation in 8407.29 refers to the fact that it covers all spark-ignition marine engines that are not outboard. This includes engines used in speedboats, personal watercraft (PWC) where the engine is internal, and larger pleasure craft. Accurate classification is vital because marine engines are often subject to specific environmental and emissions standards, and the HS code is the primary trigger for these regulatory checks during the customs clearance process.

Covers
  • Inboard gasoline marine engines
  • Spark-ignition engines for personal watercraft (PWC)
  • Sterndrive engines (inner portion)
  • Inboard rotary piston marine engines
  • Marine propulsion engines for speedboats (spark-ignition)
Also under 8407.29
  • Volvo Penta V8-380
  • MerCruiser 6.2L MPI
  • Ilmor MV8 7.4L
  • Crusader Captain's Choice 6.0L
  • Indmar Raptor 400

Codes often confused with 8407.29

Common mistake. This code is often confused with 8407.21 (outboard motors) or 8408.10 (marine compression-ignition/diesel engines). It is also sometimes misclassified under 8407.34 if the engine is mistaken for a standard vehicle engine rather than one specifically configured for marine use.

8407.21Engines; outboard motors for marine propulsion, spark-ignition reciprocating or rotary internal combustion piston engines8408.10Engines; for marine propulsion, compression-ignition internal combustion piston engines (diesel or semi-diesel engines)8407.34Engines; reciprocating piston engines, of a kind used for the propulsion of vehicles of chapter 87, of a cylinder capacity exceeding 1000cc

Top exporters and importers of HS 840729 (the code used for inboard marine engine), 2025

In 2025, the largest exporter of HS 840729 (the code used for inboard marine engine) in UN Comtrade data was Japan, with 45% of world exports; the largest importer in UN Comtrade data was Brazil, with 17% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Figures cover everything classified under HS 840729, not only inboard marine engine.

Top exporters 2025 · share of world exports

  1. 1 Japan $167M
  2. 2 United States $71M
  3. 3 Austria $70M

World total: $366M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Brazil $28M
  2. 2 United States $21M
  3. 3 Belgium $14M

World total: $166M Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM codes for inboard marine engine

Brazil splits HS 8407.29 into 2 NCM codes. Pick the one that matches your product:

  • 8407.29.10Single-cylinder spark-ignition marine inboards
  • 8407.29.90Other spark-ignition marine inboard engines

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about inboard marine engine

What is the HS code for Inboard marine engine?

The HS code for Inboard marine engine is 840729 (Engines; for marine propulsion, (other than outboard motors), spark-ignition reciprocating or rotary internal combustion piston engines). The HS code for inboard spark-ignition reciprocating or rotary internal combustion piston engines for marine propulsion is 8407.29.

How do I classify Inboard marine engine for customs?

Inboard marine engine is classified under HS code 840729 — Engines; for marine propulsion, (other than outboard motors), spark-ignition reciprocating or rotary internal combustion piston engines. This is a 6-digit subheading level code.

Does this code include diesel inboard engines?

No, diesel (compression-ignition) marine engines are classified under HS code 8408.10.

Which countries are the top exporters of inboard marine engine (HS 840729)?

In 2025, the top exporters of HS 840729 (the code used for inboard marine engine) in UN Comtrade data were Japan ($167M, 45% of world exports), the United States ($71M) and Austria ($70M). World exports came to about $366M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of inboard marine engine (HS 840729)?

In 2025, the top importers of HS 840729 (the code used for inboard marine engine) in UN Comtrade data were Brazil ($28M, 17% of world imports), the United States ($21M) and Belgium ($14M). World imports came to about $166M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Is the HS code for Inboard marine engine the same in all countries?

The base HS code 840729 for Inboard marine engine is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for inboard marine engine in Brazil?

Brazil splits HS 840729 into 2 NCM codes, so the right one for inboard marine engine depends on the product's details: 8407.29.10 (Single-cylinder spark-ignition marine inboards), 8407.29.90 (Other spark-ignition marine inboard engines).