This manual covers the Mercury MerCruiser #41 Turn Key Start (TKS) Carburetors, manufactured by Mercury Marine in the USA. These carburetors are designed for marine engine applications, supporting displacements of 3.0L, 4.3L, 5.0L, and 5.7L, and are compatible with Alpha and Bravo drive systems. The engineering quality and reliability inherent in Mercury Marine products are reflected in the detailed information provided for these essential fuel system components. The purpose of this English-language Service Repair Manual Supplement is to provide comprehensive guidance for the service, maintenance, and repair of the Mercury MerCruiser #41 TKS Carburetors. It includes step-by-step repair procedures, detailed maintenance specifications, disassembly, assembly, inspection, and adjustment procedures, all enhanced with illustrations and photos. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their marine engines.