For Volvo, the factory manuals have a part number, just like a part. They have separate manuals for engine mechanical, EFI, and stern drive/transom shield. To get the right ones, you need to know what "version" of the engine you have, for example mine is a 5.7GXi "F." If you don't know yours, you can go here, plug in your engine serial number, and it'll tell you:
http://www.volvopenta.com/volvopenta/na ... earch.aspxOnce you know what you have, you can order the correct manuals from any VP dealer. I'll warn you, though - the Volvo shop manuals are pretty well geared toward the professional mechanic. There's very little in the way of theory of operation, etc.