Are you sure it opening and closing when the engine is running? There is an aerodynamic load on the "butterfly" when it's running and it wants to stay wide open so you have to work against a "lift" force to close it. Some of these choke butterflies have a "pressure relief door" on them that allows a big reduction in air flow and then it pops open to suddenly admit more air to a cold engine on a choked start. If you have one of these you have to make sure that it's not staying open when you choke it. You should be able to make the engine die with full choke.
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Today's Featured Article - Women and Tractors, A Woman's Touch - by Teri Burkholder. I thought I would give you a little background on how I got myself hooked on tractors and their restoration. My family is a very "crafty" bunch of people. By crafty I mean good with crafts!! My Dad is a retired industrial engineer from Bucyrus Erie which made big shovels for excavating and he is also a wonderful wood worker. My mom and my "guardian angel" has had her own ceramic shop for 30 years and is an excellent painter. With these skills always active in our house it was hard not t
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