hello. I have a 2004 25hp Johnson (model j25rlsrr). this is a pullstart and I am curious of what I need to do to hook up a 12 volt charger for a battery on the boat to power running lights, bilge pump, ect. . when I follow the wires off the stator there is 2 yellow wires that are capped off and not used. are these possibly to hook a rectifier too? if so can I order a rectifier off one of the electric start model engines of this class and size and simply wire it in or does Johnson make some kind of a kit? any advice would be appreciated. thanks! p.s. if anyone has any ideas on removing the temperature switch from the head without destroying it let me know