This workshop service repair manual covers the Tohatsu 140 HP outboard motor, applicable to all model years. Engineered for reliability and performance, these powerful outboard motors are designed for a wide range of marine applications. Their robust construction and efficient power delivery make them a trusted choice for boaters seeking dependable propulsion. This manual provides comprehensive information to ensure the optimal operation and longevity of your Tohatsu 140 HP engine. This manual serves as an essential guide for owners, mechanics, and technicians, detailing every aspect of maintenance and repair. It includes in-depth procedures for tune-ups, lubrication, cooling system service, and comprehensive troubleshooting for electrical systems, complete with wiring diagrams. Repair procedures for critical components such as the powerhead, lower unit, fuel system, ignition system, and trim and tilt system are thoroughly explained. With hundreds of pages of detailed information, including pictures, diagrams, and photos, this manual facilitates efficient DIY repairs and professional servicing.