The tang is a small metal doobie thingy...technical term... that actually does the pressing against the needle. As you move this one way or the other the float height changes ergo the float level does too. In your case I would suspect the needle has a grove worn into the viton tip causing the fuel to continue flowing when you shut the engine off. As for the engine winding up as it starves of fuel yes it is normal for this to happen..the fuel is getting leaner.
Is your fuel valve vacuum operated or do you have to switch it on and off. Reason I'm asking is if fuel is still flowing in the off position then you have a leaking valve.
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Last edited by Aussie Steve; 05-17-2008 at 05:12 AM.
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