Ignition switch is fine.<br /><br />The only time you're interrupting the current to your coil (and creating a spark) is when you turn the key off. Either your points, CD box or wiring is bad - they should be make/breaking current 4X per revolution. The '72 85 has points (under the flywheel); the 125 has a different setup with a sensor in place of the points. If you find a wiring diagram, you should be able to tell whether your points are working.
i have a factory repair manual i can take a pic or copy send it to you if i had your e mail or some one could tell me how to put it on the forum .not much on putting something on the forum.type a message is about it
thank you for replying ,ill check the points, i have a clymer book,and a evinrude manual, these cover many diff motors, should i need the shop manual i'll reply,making progress