The reason I ask is, most of the information is really found in the engine and drive service manual. The Boat owner's manual is fairly generic. The systems are better documented in the OEM manufacturers docs, like Perko, Attwood, etc. I do recall the owners manuals have electrical schematics, though. I just see most boat owners trip over themselves to find the manual, only to find it is not like your car or lawmower, where everything you need to know about basic maintenance is in there.