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Old 04-08-2012, 11:33 AM   #62714
Beastly Adventurer
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Joined: Oct 2007
Location: Flagstaff Az
Oddometer: 1,369
Tunning by spark plug color is alittle tougher these days,gas burns alot cleaner.Google it,alot different these days:arc(where,timming),) on eletrode,color (how many,heat range) on threads and the color on the base(inside,wide open) of the insolator.
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