1970 thunderbolt still no spark

[archerobx]

1970 mercury 800 80hp.

I replaced coil and still no spark.
Not sure what to check next or how expensive its going to get. There are a few wires that need replacing and I plan on replacing them but was going to do that once i figured out how to get spark.
thank you
Ryan

 

[Chris1956]

Re: 1970 thunderbolt still no spark

Ryan, There should be a troubleshooting procedure for your motor on the CDIElectronics web site. There should be a wiring diaghram on the maxrules web site. The switchbox is listed as NLA from Merc. Hopefully CDI will have something for you, if you need it.