This manual covers Mercury Mercruiser Turn Key Start (TKS) Carburetors, serving as a supplement to manuals #25, 26, and 31. It specifically addresses models including the 3.0L Alpha (Serial Number prefix 0W302000), 4.3L Alpha (Serial Number prefix 0W300013), 5.0L Alpha and Bravo (Serial Number prefix 0W300010), and 5.7L Bravo (Serial Number prefix 0W300755). These TKS carburetors are engineered for reliable performance in marine applications. This comprehensive Service Repair Manual in English provides essential information for maintaining and repairing your Mercury Mercruiser TKS Carburetor system. It includes detailed sections on important information, engine components, electrical systems with wiring diagrams, fuel systems including TKS carburetor diagnostics, and cooling systems. The manual also covers general maintenance procedures and troubleshooting, offering step-by-step guidance for service, repair, assembly, and disassembly.