If you don't have a repair manual for your stern drive (i/o) boat motor, you're probably paying the dealership too much for some repairs you can do yourself. Stern drive tune-up and repair manuals published by Seloc cover most models of Mercruisers from 1961, most OMC models from 1964, and most Volvo-Penta models from 1968. Additionally, Ken Cook Publishing has made many previously obsolete boat motor owner's, service and repair manuals available for OMC motors dating back to the early 60's. Keep some of that cash in your pocket and tackle some of those stern drive repairs or tune-ups yourself. Seloc manuals feature clear instructions and photos for repairs such as fuel systems, cooling systems, drive maintenance, lubrication points, winter storage, fluids and lubricants, ignition, trim and tilt, and much more.