1978 Suzuki Spirit 50hp no spark

Pikey23

Petty Officer 3rd Class
Joined
May 31, 2010
Messages
93
Hello, My neighbor is building a boat and has a 1978 Suzuki spirit 50hp motor. It has good compression but no spark. Any suggestions on where to start trouble shooting? I will try to get the serial number for it soon. Thank you.
 

Pikey23

Petty Officer 3rd Class
Joined
May 31, 2010
Messages
93
Re: 1978 Suzuki Spirit 50hp no spark

Got the numbers today Model 5001 Serial: D-11292

He changed the ignition switch a few days ago because he did not have a key for the old one. The wiring does not seem right to me.
White, 12v constant
orange, choke, works with key pushed in.
green, seems like ground, although I can not find where it exits the umbilical cord on the motor side, attached to a "M" terminal
Black- ground to engine block, on a "m" terminal
brown-starter, on the 12v with key in start position, works fine
yellow wire tapped up
blue wire tapped up
he said that those wires were taped on the old switch

I am confused because he does not have anything going to the 12v with key on terminal. I tried hooking the yellow wire to it but it did nothing. any ideas how this should be wired? Thanks
 
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