Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THERE OF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORD ERS AND REPRODUCERS, AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 07 Spark-ignition reciprocating or rotary internal combustion piston engines. 84 07 21 Outboard motors : Not exceeding 25hp Commodity Code Description 84 07 21 10 Outboard motors : Not exceeding 25hp 84 07 21 20 Outboard motors: Exceeding 25hp but not exceeding 40hp 84 07 21 30 Outboard motors: Exceeding 40hp 84 07 21 90 Other