So I'm about to install my jet kit soon and I was looking for a fuel screw. The one on th e JD website says this
"Adjust your idle mixture quickly and easily with the JDJetting Fuel Screw, without the need to use tools. Red anodized billet adjustment knob and hardened brass tip for best quality. Precision machined to ensure consistent results and a reliable setting. The JDJetting Fuel Screw features an o-ring on the shank to reduce vibration and prevent the fuel screw from loosening on most FCR carburetors.
DOES NOT INCLUDE SPRING, WASHER AND ORING."
Makes me a little unclear about this oring business...... Says it features the oring but also says it doesn't include one as well as a spring or washer...... is this something I need to buy seperately or will it make sense once I get in there to install? (ie: there's factory hardware that I simply swap over)
Sorry if this is dumb, but I'm a FI/diesel guy. carbs are lost on me