{HEAD ~ An outboard motor} 12 wherein the at least one air introduction passage comprises a pair of air introduction passages provided at {TAIL ~ opposite lateral sides} of the intake silencer and extending downwardly along the second side of each cylinder head 
{ HEAD ~ An outboard motor } 12 wherein the at least one air introduction passage comprises a pair of air introduction passages provided at { TAIL ~ opposite lateral sides } of the intake silencer and extending downwardly along the second side of each cylinder head
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH