Re: 1963 mercury 100hp tower of power no spark
That motor has 2 sets of points, 2 coils, and 2 ballast resistors it is possible that the points are dirty here is a wiring diagram
![Merc-I-6-wiring.jpg Merc-I-6-wiring.jpg](https://forums.iboats.com/data/attachments/78/78505-205b4f337c8060859531d236ae41eac2.jpg)
to help troubleshoot any power supply issues
and here are 2 pages that describe the distributor
![I6-distributor2.jpg I6-distributor2.jpg](https://forums.iboats.com/data/attachments/78/78513-f688d8e0e87642bfc71e77959aa03077.jpg)
![I6-distributor-1.jpg I6-distributor-1.jpg](https://forums.iboats.com/data/attachments/78/78508-e13c21bc3793c53cc9212d17e4412276.jpg)
,
I would test for power at the coil + side before tearing apart the dist.
Are you sure this is a 1963 year?