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How to Adjust a Walbro Carburetor?


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The WG8 carb has a fixed high rpm jet (non adjustable), the long slender screw only adjusts low speed carburation (idle mixture). The conical screw adjusts the idle speed by adjusting where the throttle lever stops and therfore the position of the butterfly in the carb.

On mine when it was running lean at high rpm I had to slightly bend the meter lever up to increase overall fuel flow then adjust idle mixture to suit.

Stripdown pics HERE

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