This workshop service repair manual covers the 90 HP outboard motor, encompassing all styles. Engineered for reliability and performance, outboard motors are known for their robust construction and efficient operation, making them a trusted choice for various marine applications. This manual provides comprehensive information to ensure optimal functionality and longevity of your 90 HP model. This extensive English-language manual, presented in format and spanning hundreds of pages, is designed to be an indispensable resource for owners, technicians, and mechanics. It details essential maintenance procedures, including tune-ups, fuel system, lubrication, cooling, powerhead, lower unit, trim and tilt, gearcase, and starter repairs. Additionally, it offers guidance on electrical system troubleshooting, tools and equipment, and boating safety, supplemented by hundreds of illustrations, step-by-step instructions, and detailed substeps with notes, cautions, and warnings.