8407.29.00.10 - Inboard engines with outboard drive

This HTS category, 8407.29.00.10, specifically covers inboard internal combustion piston engines designed for marine propulsion that are equipped with an outboard drive system. These engines are integrated within the hull of a vessel but utilize a drive unit that extends through the transom or hull to a propeller located outside the vessel's main structure. The primary function of these units is to provide thrust for moving watercraft.

The key differentiator for this classification is the combination of an inboard engine with an outboard drive. This distinguishes it from sibling categories such as "inboard engines with inboard drive" (8407.29.00.00), where the entire engine and drive system are contained within the hull, or from entirely outboard motors where the engine, drive, and propeller are all mounted externally. The "outboard drive" aspect refers to the system that transmits power from the inboard engine to the external propeller assembly.

As this is a leaf node within the HTS, there are no further subcategories. Classification within 8407.29.00.10 is determined by the presence of an inboard spark-ignition internal combustion piston engine specifically configured for marine propulsion with an integrated outboard drive unit. Examples include sterndrive systems, which are a common type of inboard engine with an outboard drive.