I did for several months . . . and now wish I had replaced it on day one. The engine always sounded rough as if it was firing only on some cylinders, randomly. Even after replacing the carburetor, plugs, and points, and numerous timing alignments. Replaced the coil and now it sounds like a different engine. Definitely firing on all 4. Plus as a bonus, I was able to turn in the idle screw another 1/2 turn and see the engine idle at a nice low rpm for the first time, with no coughing and sputtering.
