In a message dated 11/5/2010 9:25:46 P.M. US Mountain Standard Time, contactsmu at sbcglobal.net writes: The advance is 29 degrees BTDC. I'm using 93 octane. Should I widen the gap and/or look elsewhere? 29 degrees????? Better get that fixed first. Plug gap is OK but could be 035". Regards, Bob Helt