| 840710 | 840710 - Engines; for aircraft, spark-ignition reciprocating or rotary |
| 840721 | 840721 - Engines; outboard motors for marine propulsion, spark-ignitio |
| 840729 | 840729 - Engines; for marine propulsion, (other than outboard motors), |
| 840731 | 840731 - Engines; reciprocating piston engines, of a kind used for the |
| 840732 | 840732 - Engines; reciprocating piston engines, of a kind used for the |
| 840733 | 840733 - Engines; reciprocating piston engines, of a kind used for the |
| 840734 | 840734 - Engines; reciprocating piston engines, of a kind used for the |
| 840790 | 840790 - Engines; rotary internal combustion piston engines, for other |