A trip to your local library may result in the ability to view the factory "Service Manual" (not operators manual) for your engine. That manual has engine related schematics in it. Failing that, you can order a factory service manual for your engine from the dealer or perhaps on-line from Mercury. If you intend to do any work on an engine it is always best to have the factory documentation at hand. It saves you time, frustration, and most of all, money because it helps you avoid mistakes that can be very costly. Yes -- I understand the part about "free".