8407.33 - Of a cylinder capacity exceeding 250 cc but not exceeding 1,000 cc:

This HTS category, 8407.33, specifically covers spark-ignition internal combustion piston engines designed for reciprocating motion, where the engine's cylinder capacity falls within the range exceeding 250 cubic centimeters (cc) but not exceeding 1,000 cc. These engines are typically used as the primary power source for various types of vehicles and machinery.

Distinguishing this category from its siblings, 8407.31 and 8407.32, is the defined cylinder capacity range. 8407.31 addresses engines with capacities of 50 cc or less, while 8407.32 covers engines between 50 cc and 250 cc. Conversely, 8407.34 encompasses engines exceeding 1,000 cc. Therefore, 8407.33 acts as an intermediate classification for mid-range displacement engines.

The subcategories under 8407.33 further refine the classification based on the intended application of the engine. This includes specific provisions for engines destined for installation in tractors suitable for agricultural use, and a broader category for engines intended for vehicles falling under specific subheadings or headings within Chapter 87, such as those for motor vehicles and chassis. The residual "Other" category captures engines that do not meet these specific installation criteria.