8407: Spark-ignition internal combustion engines

840710: Aircraft engines, spark-ignition 840721: Outboard motors, spark-ignition 840729: Marine propulsion spark-ignition engines nes 840731: Engines, spark-ignition reciprocating, <50 cc 840732: Engines, spark-ignition reciprocating, 50-250 cc 840733: Engines, spark-ignition reciprocating, 250-1000 cc 840734: Engines, spark-ignition reciprocating, over 1000 cc 840790: Engines, spark-ignition type nes 8407: Spark-ignition internal combustion engines