A-B1793610-AI KIT-IDLE MIXTUREOne New Aftermarket Replacement Idle Mixture Kit Fits Briggs & Fits Stratton Small Engines This idle mixture kit (carburetor idle mixture screw and needle assembly) is designed for use with Nikki brand carburetors fitted to Fits Briggs & Fits Stratton (B&S) small engines. It regulates the fuel and air mixture at idle, helping prevent rough running, stalling, and inefficient combustion at low engine speeds. Commonly used during carburetor rebuilds and