Your complete guide to maintaining and repairing OMC stern drives from 1964–1986. This Seloc manual covers all Ford and GM-powered units with step-by-step instructions, hundreds of photos and diagrams, and detailed wiring schematics. Whether you're tackling routine maintenance or a full engine overhaul, you'll find everything you need. Skill ratings help you gauge job difficulty, and special tool icons show what you'll need. Trust the manual used by technical schools and the military for over 50 years.