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 - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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