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Fcr Drain screw

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Quick question. I just installed a fcr 39 on my drz. As soon as I turn the petcock on to the prime (vacume nipple not installed yet) position gas is leaking out the very bottom drain hole. I have the allen drain bolt/screw turned all the way in just wondering if i'm missing something or if I should turn the screw in even tighter but it feels as though it is seated well and I don't what to break anything.

Thanks for the help

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Used FCR? Did you go over the carb before you tried to put it on?

Check/set the float height? Confirm the float needle seat oring is intact? Check the AP diaphragm condition and so on and so on.....

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Thanks BuMtarder I do mean "the tiny set screw located on the drain nipple and not the float bowl cap" carb is used.

Thanks for the help

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Pretty sure that drain nipple is both bowl drain (drain screw) and high fuel level over flow. So I suspect it is high fuel level that is dripping out of the nipple. Check float setting and float valve and the "O" ring on the float valve.

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