Re: carburetor flooding

Posted by Marco on April 04, 1998 at 23:57:37

In Reply to: carburetor flooding
posted by Wayne Parker on April 04, 1998 at 22:29:10

: I have a Zenith 2 carburetor that seems to flood very easily when you are are starting a warm or semi-warm engine that has been sitting for an hour.(Cold starting is fine.)Carb was rebuilt several years ago and this was not a problem initially.When warm, the engine is very reluctant to start and if it doesn't catch in the first 3 or 4 seconds of cranking, there will be a fair bit of gas dribbling out the throat of the carb.Then, the only way to start the car will be to hold the gas pedal to the floor and crank.It will then always start.I am assuming that the problem is carb related.What could be causing this?I believe that my starting technique is OK.
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Wayne,
The only way an "A" carb should dribble from the throat is from choking. before we dissect the carb, please confirm that this is not the cause. A properly running Model A requires the choke to be pulled for two compression strokes maximum WHEN COLD (although the instruction book says "until starts"). After the engine is warm and then sits as you describe, it is normal to require one compression stroke (and no more!) before releasing the choke and will typically fire on the second or third compression stroke.
Also check your points if you haven't recently. When the point block wears and the gap becomes smaller it becomes more essential that all other conditions be correct.
Let us know!!!
Marco

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