M magna_503 Member Apr 13, 2009 251 0 16 Portland, OR May 18, 2014 #1 Anyone knows the stock gx390 jet size is? I need a smaller jet as it is pig rich on the 212 right now... The spark plug is so black it's not even funny.
Anyone knows the stock gx390 jet size is? I need a smaller jet as it is pig rich on the 212 right now... The spark plug is so black it's not even funny.
