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Old 02-10-2012, 06:23 PM
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cooling system has nothing to do with this problem

the symptoms lead to a clogged exhaust or a clogged carburator

also a bad fuel pump can do the same

if there are no backfires or the engine keeps running after the ignition is cut, I would say the ignition sustem is fine, but I'll look anyway under the distribuitor rotor for a frozen timing advance mechanism.

does it smoke black when the problem happens? this will lead you to an overly rich clue, like a choke plate that shuts or a bad needle valve.
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