@chip

Hi Mike

As per Tiny above, Chip is the guy to talk to.

But in the mean time, the short answer is no, there isn't anything you can wrap with teflon tape.

There are sealing washers under the heads of the screws (most screws have flat, but one has tapered).

You could possible put a very small amount of non-hardening gasket sealer on the washers, BUT...

those screws can sometimes be VERY hard to get out, and can end up getting buggered up in the process...

so be aware of that.

If you are lucky, the screw might come out with the carb on the engine, but I wouldn't try too hard.

I've had great success using an impact screwdriver and a hammer with a bit that fits the slot as perfectly as possible.

But, you have to have the carb off the engine and resting on a block of wood for that.

Hope the screw comes out easy for you!  🙂

There are some soft metal washers (copper or brass) that should be installed on those tapered screws. Because of ethanol in gasoline many of the older sealants like Permatex are not as gasoline resistant as in the past. I am not a fan of silicone sealants with gasoline. I did find a gas resistant paste type thread sealer at a HVAC supplier. Seems to work well so far.

Thank you as usual gents. This is a rebuilt carb from a gent in northern ca. 2/2 carbs have problems but too much time passed this time.
-What is behind these screws, anything? 
-what is the purpose of these screws? 

What alternative is there after I remove the screws? Should I replace screws with new in addition to new gaskets? Do I have to purchase and entire rebuild kit to get the screws and gaskets? 

@michael-alvarez 

Hi Mike

You shouldn't have to replace anything if nothing is destroyed in removing them.

The plug in your last picture (the one that angles upward) has the main nozzle (which sticks up into the venturi) behind it.

A new washer or something to help seal the one already there is all you need there.

The other plug (the horizontal one near the idle screw) is an idle passage plug and a new washer or something to help seal it is all you need there as well.

But...

Hidden from view in your pictures is a "plug" underneath that first plug which is in a passage that runs straight up into the carburetor.

THAT "plug" is actually the low speed jet, and is the one with a tapered washer for sealing.

THAT one is a bit trickier.

If it is removed and ANYTHING is done with the washer, the hole on the tip away from the outside end of it should be CAREFULLY and VERY SLIGHTLY enlarged with something like a leather awl.

That tip wedges into a tapered seat and forms an important seal of it's own each time the jet is installed.

The alternative is to just install a new jet (if you can get one).

Hope I haven't scared you off of doing the work yourself, it's really not that hard.  🙂

Thank you Ole. i need to find a proper seal for those screws, it seems the upper screw is leaking but I didnt find any more leaks up to this point. I don’t expect to tamper with the the low speed jet. I feel more confident when I do something myself at least in my Chevrolet. I will keep you all posted. 

The Filling Station has the washers pictured in their kits. https://store.fillingstation.com/dept/Fuel+System/cat/Carburetor.html

They are special washers and I don't think they are sold separately but you could ask. The Carburetor Shop https://www.thecarburetorshop.com/ has excellent kits as well. Jon takes calls on Monday and Tuesday.

Dave   

Jon is also a regular contributor to Chat under the handle carbking.

Looks like I need plug washer gaskets