Re: how to wire a battery to a 50 hoarse 4 stroke yamaha outboard
Not sure what you mean. If it's electric start there is a red and black wire, these connect to the battery and that's it, no other connections are needed. If it's manual start and you want to charge a battery you must first make sure it has a charging system on it, or put one on yourself. The two wires from the charging system will then go to the battery.
Some Yamahas come with a charging coil already in the system, but you still need to install a rectifier