I have a Holley carb that I'm learning on. I'm attempting to rebuild it and in the process of trying to set the float height, the paper gaskets under the jam nuts on the adjusting screws got screwed up and now there's a gas leak. It seems like I shouldn't have had to screw around with the adjustment screw as much as I have, so the chances of me doing it wrong are high. With the engine running, I pull the sight plug and adjust the float level until a bump on the fender with my hip gets gas to just trickle out, right? Once I'm satisfied with the adjustment, how tight should I tighten the jam nut? Thanks
The "nut" IS the adjustment on any holley carb. I have had. The flat screw is the "jam" nut. If you turn the nut without backing off the screw, It will screw up the gaskets. If you turn the nut after adjusting the float, It will knock it back out of adjustment. Set the level with the nut and tighten the screw.
If you want to be AR about it, give me the nut size and I'll give you a torque value = to the precision of a gnat's ass. But snug should do it unless it has geen gorillaed in the past and something is not quite pristeen any longer. Bob
I had a Holley once that someone had rebuilt with a cheap kit. The screw was the adjuster, and the nut was the lock nut. I stripped the bowl threads trying to adjust it. Just be aware that what you know ain't always so.
Just relaying my experience with the Holley carburetor that I have used over the past 30 years. I wasn't trying to cover any and all exceptions, Just Holley in general. By the way, As far as a Gnat's ass, It is a 5/8 nut. Tell me what it should be torqued to. To the o.p. This was copied from a Holley tech article. Use a screwdriver to remove the sight plugs located in the float bowls on the passenger side of the carburetor. Fuel should be level with the bottom of the sight plug. If not, adjustments can be made to raise or lower the fuel level with the adjustment nut on top of the float bowl. Loosen the top lock screw with the screwdriver and use the 5/8-inch wrench to turn the nut, which is the adjustment. Turn the nut clockwise to lower the level of fuel or counter-clockwise to raise the fuel level.
Yeah me too. Sadly this was new out of the box due to the lack of their quality control. Quit using them 20 years ago.
OOOOOOK! Ya I dought that is accurate. Maybe for a grade 5 or higher going into a block perhaps, a Holley float cast will strip I am thinkin before it hits 15 lbs. Keep in mind, is hollow, not to mention weak. This is like everything else, It has become way to complicated. Snug the bolt is all
Some of you guys are not listening. Unless something has been screwed with, the NUT is the adjustment, the SCREW is the lock!
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