Re: TRACKER 185 special edition
Thre really isn't such a thing for most boats, normally all a new baot comes with is a bunch of legal papers, "Don't attempt to stop the propeller with your teeth: kinda stuff and papers for the engine.
They make so few boats compared to cars it just isn't cost effective to make a manual and the wiring diagram I know you won't find, those are almost always outsourced and just come in with a model number and are installed so oyu are on your own there.
Boats are pretty simple compared to a car and ormally by the time a boat is on its 2nd or 3rd owner thay have been wired and rewired an unwired so it would do you little good anyhow, just ne aware that a boat uses a closed electrical system as in there isn't an open ground like on your car and you should never ever ground anything to the boat.