Home › Forum › Ask A Member › 1949 Johnson 10hp QD-10 igntion questions › Re: 1949 Johnson 10hp QD-10 igntion questions
It is my opinion that you may have good coils but dirty points and maybe faulty condensers. This ignition system has a magnet rotor that spins close to the coils, they face inward to the rotor. Meter the coil and read for secondary continuity. Go from spark plug wire to the ground on the coil and you should get an ohm reading. If you get an open reading, just like holding the two ends of your ohmmeter apart, then you have bad coils. If you do get a good reading, somewhere between 1000 and 5000 ohms, then the coils "should" be good. Clean the contacts of the points and install new condensers and then see what kind of spark you get. I am sure others will chime in with their opinions. Take your time and do some research!