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Old 11-19-2019, 12:30 PM   #14
scicala
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Join Date: Jun 2010
Location: Detroit suburb, MI
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Default Re: Float gauge for Holly 1901 carb

Merc Cruzer,


Other than a good inspection of everything and all of the passages/channels, just make sure the economizer diaphragm doesn't get pinched when installing. I find it easier to collapse the spring on it and tie it collapsed with some tag wire. This way it's not trying to pull on the diaphragm when installing. Also put some light oil on the screw threads for it, so they don't catch and twist the diaphragm when tightening.
Also they are prone to a fuel leak where the large brass screw/plug goes over the float valve. You can also use a large O-ring on the brass plus instead of the round gasket.
I would keep the float level at spec or even 1/32" higher to avoid a possible hesitation. If your engine never had a hesitation, then just set the float to spec. (5/32").
Other than that just common sense and patience.


Sal
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