Postby Workshop Help » 11 May 2014 01:10
There is a small O-ring around the base of the brass adjusting screw that holds and moves the metering needle. After a while, the O-ring dries out and shrinks. This allows the oil in the 'stalk' to be inhaled into the intake tract to be burned in the combustion chamber.
This O-ring is found in the Z-S carburetor overhaul kit. The fly-in-the-ointment is replacing the O-ring as the adjusting screw and the metering needle must be removed from the air slide. Which means you will go thru the seven gates of Hades, barefoot over the tack strewn floor, and immersed in the proverbial bucket of porcine offal trying to adjust the mixture back to it's correct state of tune. This could take years.
Most folks who realize these ramifications just add a squirt of oil every couple of weeks as needed and don't lose any sleep over it.
Mildred Hargis
