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Yup, that is correct.It's callled a slow cut valve and only on US carbs.
It cuts off fuel at idle from the 2nd slow jet circuit. Cross section looks like a spring and needle valve deal.
It is linkage actuated. as the primary throttle goes past 50% open, the linkage starts to contact the lever and open the plunger.I'd like to know under what load conditions or rpm range it does open.
Yes. That's why it is necessary to extract the guts of the valve, then seal the hole where the plunger was located. If modified correctly, the secondary slow circuit is left open all the time, like any normal carb.If disabled, isn't the 2nd slow jet circuit also disabled?
If disabled, isn't the 2nd slow jet circuit also disabled?
Yes. That's why it is necessary to extract the guts of the valve, then seal the hole where the plunger was located. If modified correctly, the secondary slow circuit is left open all the time, like any normal carb.