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Old 04-07-2021, 09:38 PM
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ol'George ol'George is offline
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Join Date: Oct 2009
Location: MI
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It is called the main jet, yes it needs removed so you can remove and clean the emulsion tube above it and clean all the little holes in it.
custom grind a good screwdriver to fit the screw slot tightly and properly.
Better to find one in a hex drive that comes in some in packages meant for a battery powered screwdriver/drill motors.
then you can put a lot on tension on it in a vice and a 1/4" drive ratchet without worry of it slipping out of the screw slot.
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