[quote="CVPost-pete 23"](quoted from post at 21:27:57 05/07/16) It will depend on which carburetor you have as to which direction you turn idle mixture screw. If it has a large screw that is down a bit from mounting flange, it is an air screw and turning out gives more air. If smaller screw right up in the flange it is a mixture screw and turning out enriches mixture. At any rate, forget about the one turn. That is just a general starting point. Always set where engine idles best. It sounds like you are running rich at idle and will need to repair carburetor. If it does not smoke slightly black from running rich, it might be lean and sucking air around manifold also.[/quote.]the M we have did that. Turned out manifold was cracked the whole way around one end on exhaust but near the middle. Put on a different manifold and it fixed it. Purrs like a kitten at idle now.
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