i have a 2002 yam 90. i replaced the plugs after the top plug fouled out. since then it ran great for about 6 hrs. then it fouled out that top plug again. i replaced the plugs again and switched the top and bottom coils to see if the problem would follow the coil. ran it for about 2 hrs. and so far it has not fouled a plug yet but im sure it is just a matter of time. does this sound like anything anyone else has delt with. thanks for the help
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