Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders 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. Commodity Code Description 84 07 10 Aircraft engines 84 07 21 Outboard motors not exceeding 25 h.p rating. 84 07 29 Other 84 07 31 Of a cylinder capacity not exceeding 50 cc 84 07 32 Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc 84 07 33 Of a cylinder capacity exceeding 250 cc but not exceeding 1,000 cc 84 07 34 Of a cylinder capacity exceeding 1,000 cc 84 07 90 Other engines