8407: Spark-ignition reciprocating or rotary int combu piston eng

840710: Aircraft engines, spark-ignition reciprocating or rotary type 840721: outboard motors, spark-ignition reciprocating or rotary type 840729: Marine engines nes of the spark-ignition reciprocating or rotary type 840731: Engines, spark-ignition reciprocating, displacing not more than 50 cc 840732: Engines, spark-ignition reciprocating, displacg >50 cc but nt more 25 840733: Engines, spark-ignition reciprocating displacing > 250 cc to 1000 cc 840734: Engines, spark-ignition reciprocating displacing more than 1000 cc 840790: Engines, spark-ignition type nes 8407: Spark-ignition reciprocating or rotary int combu piston eng