Zenith Carburetor Adjustable Main Jet for Wisconsin S8D S8BD 12982 L63AN S1 Z89 This item fits the following Wisconsin Engine Model numbers: S-8D,      S8D,      S-8BD,      S8BD Fits the Zenith Carburetor number: 12982 Fits the following Wisconsin Carburetor numbers: L63AN,      L63-AN,      L63-AN-S1,      L63ANS1,      L-63AN-S1