Slightly open choke does not affect fuel going back to the tank..but it does prevent the engine from getting a proper dose of gas to get cold started in the first place.
Even in New Orleans, where its always warm, having a fully closed choke is necessary for a cold engine to start properly and easily.
This isn't just from hearsay...its my experience with over a year on this engine.
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Bill L.
1972 Ericson 27
Hull #61
Atomic 4
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