A number of different materials were used, but felt was the most common used by Zenith.

If you do not have access to felt, try an older hardware store for the graphite impregnated string faucet packing.

OR

If you need to do a carburetor rebuild, the felt is contained in the kit we make.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop