This manual covers the Yamaha 25ESHQ Outboard, a 1992 model year 2-stroke engine. This in-line engine features a displacement of 470 cc (28.7 cubic inches) and delivers a maximum power of 25 hp (18.6 kW) at 5000 RPM. It utilizes a CDI ignition system and a carburetor for fuel delivery, with a water-cooled system ensuring efficient operation. Designed for reliable performance, this outboard is engineered with Yamaha's commitment to quality and durability. The purpose of this comprehensive Service Repair Maintenance Manual is to provide detailed information for the upkeep and repair of your Yamaha 25ESHQ Outboard. It includes essential procedures for disassembly, repair, assembly, and inspection, complemented by exploded diagrams for clarity. This English language manual, presented in a bookmarked and searchable format, is an indispensable resource for owners, mechanics, and technicians. It guides users through maintenance tasks such as fuel mixture, lubrication, and component replacement, ensuring the longevity and optimal performance of the engine.