8408.10.00 - Marine propulsion engines

This HTS category, 8408.10.00, specifically covers marine propulsion engines. These are internal combustion piston engines, designed and intended for the purpose of propelling watercraft. The key defining characteristic is their application in marine environments, distinguishing them from engines used in other modes of transport or stationary applications.

Within the broader classification of compression-ignition internal combustion piston engines (8408), this sub-heading is differentiated from its siblings. Category 8408.20 pertains to engines used for the propulsion of vehicles of chapter 87, such as automobiles and trucks, whereas 8408.90 encompasses all other types of compression-ignition engines not covered by the more specific categories. Therefore, 8408.10.00 is exclusively for engines that provide motive power for boats, ships, and other vessels.

The further breakdown within 8408.10.00 is based on the engine's power output, measured in kilowatts (kW). This granular subdivision allows for precise classification based on the engine's capacity, ranging from those not exceeding 111.9 kW up to those exceeding 746 kW. This power-based differentiation is a critical factor for tariff and regulatory purposes, reflecting varying levels of engine sophistication and intended application within the marine industry.