ALL MTD BRANDED ENGINES   TECH BRIEF 01.08.13.01 (MTD CARBURETOR / REBUILD KIT IDENTIFICATION )     Tech Subject: Identify Correct Huayi Or Deni Carburetor Rebuild Kits Used On MTD Branded Engines Models All MTD Engines   Affected:     Serial Number N/A   Range Affected:     Tech Issues: To correctly identify carburetors used on MTD branded engines to ensure proper rebuild kit part number is selected. 1. Carburetor Calibration Breakdown -used to communicate which parts are needed for a specific engine -More reliable than tracking by engine model Huayi 165SA Carburetor Calibration Code Carburetor Supplier 2. Determine Carburetor Supplier Supplier cast into carburetor body Usually found on opposite side of fuel inlet Supplier trademarks a. Huayi (HY) - primary supplier b. Deni (DN) - secondary supplier for higher volume engine platforms c. Ruixing (RX) - rarely used (older