65 HP merc. Not started since bought. All wires had insulation rotted off. Replaced all bad wiring with new one at a time. When I reconnect the red wire to the ignition module it sparks at the battery. When I remove the red wire from the ignition module and connect the battery, no spark at battery. I have 12 volts at the white terminal when red wire to ign. module is disconnected and battery connected. Please help. Is it possibe I have a bad ignition box and if so how much green am I gonna have to shell out for one? Serial number on motor is 2164847. Also it has the thunderbolt ignition.