The Yamaha 70TLRP, a 1991 model year outboard motor, is a robust and reliable 2-stroke engine designed for a variety of marine applications. Featuring an inline 3-cylinder configuration and a displacement of 102.6 cubic inches (1.7 L), this 70 HP motor is equipped with a CDI ignition system and water-cooling for efficient operation. Its power trim and tilt system enhances maneuverability, while the Forward-Neutral-Reverse gearcase with a 2.15:1 ratio and a long 20-inch shaft length provide versatile performance. The engine's engineering emphasizes durability and consistent power output, making it a dependable choice for boaters. This Factory Service Manual, presented in English, provides comprehensive guidance for the maintenance and repair of the Yamaha 70TLRP. It covers essential areas including general information, periodic inspections and adjustments, fuel and lubrication systems, power unit, lower unit, and electrical system details. The manual also includes detailed specifications, troubleshooting procedures, and diagnostic information, supported by clear illustrations, photos, and exploded views. Step-by-step instructions are provided to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their Yamaha outboard motor.