anyone know what the wireing setup is running off the coil. i have a loose blue wire that seems to go no were . lights up with a tester anywere on the circuit if i spin the engine up with a drill but no spark at plugs. also has a green bulb that hardly lights up. is this for a trickle charge ???. anyone have any knowledge of these engiens plz reply or if anyone got a spair manual that they can scan and send to me . thanks.