This document provides essential information for the Mercury Mercruiser Marine Engines Number 41 Turn Key Start (TKS) Carburetors Supplement. Manufactured by Mercury Marine, these marine engines are designed for reliability and performance. This supplement specifically addresses the service and repair of the TKS carburetors, offering detailed guidance for various engine models including the 3.0L Alpha 0W302000, 4.3L Alpha 0W300013, 5.0L Alpha and Bravo 0W300010, and 5.7L Bravo 0W300755. This comprehensive workshop service repair manual supplement is written in English and is intended for the do-it-yourselfer. It covers critical areas such as general information, maintenance procedures, troubleshooting, and specific systems including the engine oil pressure switch, electrical systems wiring diagrams, fuel system TKS carburetor diagnostics, and cooling systems. With high-quality diagrams and printable pages, this manual aims to help users save on service repair and maintenance costs by providing clear instructions for proper upkeep and repair.