One of the wires from the engine will be the earth cut out wire from the ignition unit, one will be the fuel solinoid from the bottom of the carb, two will be charging wires, none of these wires is a starting wire, the high tention wire from the start solinoid on the tractor too the starter motor on the engine will be the start wire, the fuel solinoid will need a 12 volt supply.
Husqvarna man, May 2010