Posted by Steve@Advance on November 22, 2019 at 08:47:44 from (66.169.147.211):
In Reply to: Carb question posted by DeanAllen on November 22, 2019 at 07:59:06:
Check the point gap, the centrifugal advance, and distributor shaft for side play. If the plugs haven't been changed lately, they may be part of the problem. Check the spark quality at the plug end of each wire. It should jump 1/4" to ground.
If it has a main jet adjustment screw, back it out about 1/4 turn.
When properly adjusted it should take sudden throttle without hesitating. A common adjustment needed when the air temperature drops.
If there is no main adjustment, could be the main jet is partially clogged. It will need to come out and be carefully cleaned with a small drill bit or torch tip cleaner. Dried ethanol residue tends to stick in the jet, it has to be scraped out. Flushing and blowing will not remove it.
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