AC_HB-112 Posted May 10, 2014 Posted May 10, 2014 I've rebuilt the carb, new air cleaner, checked spark and gap, it's getting an even flow of fuel from the tank, shot the carb full of cleaner just to double check, and seafoamed the tank. what am I forgetting? At full throttle it runs like a dream
AC_HB-112 Posted May 10, 2014 Author Posted May 10, 2014 The probem is in the subject. miss firing at lower rpms
GrincheyOne Posted May 11, 2014 Posted May 11, 2014 Sorry Lucas the subject is not repeated when you click in "read more". Mis firing is either a valve and/or ignition timing issue. A 12.5 as a twin cylinder engine, makes the diagnosis more difficult. II have no experience with the 12.5 engine, however there are members on this site who have. Just hang in there, and they will jump in with some help/ideas! Best Luck, Wayne
AC_HB-112 Posted May 11, 2014 Author Posted May 11, 2014 It isnt so much misfiring, but missing period, not firing on one cylinder all the time, every other stroke it will.
AC_HB-112 Posted May 11, 2014 Author Posted May 11, 2014 Pull right side spark plug, it will run on just the left side. Pull the left side, it wont run on the right side by itself. Gets great spark on left side. Right side is erratic almost constant. Im thinking its in the coil, what are you all thinking?
AC_HB-112 Posted May 12, 2014 Author Posted May 12, 2014 pulled the coil and hit it the ends with 400 grit paper, aswell as the fly wheel. the missing is nearly gone, little more adjusting to do and I think I'll have it. does anybody have the gap settings for this engine?
Brettw Posted May 13, 2014 Posted May 13, 2014 I had a similar issue with a Magnum twin. It needed a new plug, even though the one was already new.
AC_HB-112 Posted May 14, 2014 Author Posted May 14, 2014 Pulled the plug out of my b/s pressure washer, didn't make any difference
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