McCullough 45 HP wiring diagram

[cheez692003]

Heyall i need HELP !!! I have a McCullough 45 HP Serial number 643045481585 that i need a wiring diagram for . It has 4 wires at the plug a red, a white , a green and a purple . I can get the electric choke to kick in but i can get no spark . if anyone knows what wires to hook to make this motor run PLEASE HELP . a wiring diagram would be AWESOME !!! I would love to get this old monster running . Thanks in advance Pat .