Posted by a_lead on February 14, 2008 at 17:54:45 from (69.137.41.169):
Up-dated the ignition on my 340 to the Pertronix from this site. Still 6V Pos Gnd.
Opened up the plug gap to .040", put on a new cap & rotor, also new coil. Ran great.
Was out pushing the snow/sleet/freezing rain that we had in Md on Tuesday, tractor started to miss and back-fire, and then stopped running. Made sure it had gas, and noticed a hunk of rust in the tank sitting on the hole to the bowl. Was able to clear the rust for un-obstructed flow.
Restarted and ran okay a little bit longer then started to miss again and back-fired so hard that it blew the muffler apart on the seam, then stopped again and I haven't been able to get started again.
Motor was completely over-hauled in 1996, probably no more than 500 hrs. since.
Took the plug out of the bottom of the carb, and I think I have good gas flow.
It seems as if it has jumped timing. Short of putting the old breaker points back in, is there any other way to check for correct timing with the motor not running.
Thanks in advance for your help. Sorry for the long post.
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