Marvel Schebler Idle – Uneven in Operation

If Idle trouble is experienced, first check the manifold to cylinder head gasket and the carburetor to manifold gasket for air leaks. At slow idle an engine requires only approximately 20 to 25lbs of air per hour, and a slight leak will result in a very erratic or rough idling engine.

Also check the small holes and passages in the idle system which can become plugged with particles of dirt.

Updated on 05/30/2022

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