8407.33.10.60 - Air-cooled

This HTS category, 8407.33.10.60, specifically classifies spark-ignition reciprocating internal combustion piston engines designed for the propulsion of vehicles of chapter 87. Crucially, these engines must be air-cooled and have a cylinder capacity exceeding 250 cubic centimeters but not exceeding 1,000 cubic centimeters. Furthermore, they are intended for installation in tractors suitable for agricultural use and have a power output exceeding 37.3 kilowatts. The "air-cooled" designation is a primary physical characteristic for distinguishing these engines.

This specific classification is differentiated from its sibling category, 8407.33.10.90, which encompasses "Other" spark-ignition reciprocating engines that meet the general criteria of chapter 84 but do not fulfill all the specific requirements of this subcategory, such as being air-cooled or intended for agricultural tractors. The parent categories establish that we are dealing with spark-ignition engines for vehicle propulsion, within a certain displacement range.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification at this level is final, and the definitive criteria for inclusion are the combination of spark-ignition type, reciprocating piston design, vehicle propulsion purpose, air-cooling, specific cylinder capacity range (251-1000 cc), suitability for agricultural tractors, and power output exceeding 37.3 kW. Examples of engines falling under this code would be those found in certain types of compact or utility tractors where air-cooling is utilized for efficient heat dissipation.