840710 Aircraft Engines (Spark-ignition)
840721 Outboard Motors
840729 Other Marine Propulsion Engines (Spark-ignition)
840731 Reciprocating Piston Engines for Vehicles, Not Exceeding 500cc
840732 Reciprocating Piston Engines for Vehicles, Cylinder Capacity 50-250cc
840733 Reciprocating Piston Engines for Vehicles, Cylinder Capacity 250-1,000cc
840734 Reciprocating Piston Engines for Vehicles, Exceeding 1, 000cc
840790 Other Spark-ignition Internal Combustion Piston Engines
