I am working on a 1970 Zundapp 5hp single cylinder which is German made. It has weak spark. Stops jumping gap at 3/16 and is inconsistent at even 1/8. I posted this here because I am told that OMC had a similar ignition configuration in 60's or 70's used on some models.
To troubleshoot the ignition I am trying to understand the system i am dealing with. Basically the ignition coil is mounted outside the magneto. The magneto seems to have 2 coils that produce voltage, one for lights, and I'd assume the other to generate ignition voltage which I'd assume the ignition coil amplifies. There is a condenser and contact points in the magneto as well. The external ignition coil has 2 leads plus the spark plug post. One lead goes to ground and the other, I'd assume to the points. Testing on an ohm meter, I get continuity between the 2 leads but nothing between either lead or the spark plug wire post. I am assuming this is bad but I am not sure since I don?t understand the way this ignition system?s coil windings would be.
To troubleshoot the ignition I am trying to understand the system i am dealing with. Basically the ignition coil is mounted outside the magneto. The magneto seems to have 2 coils that produce voltage, one for lights, and I'd assume the other to generate ignition voltage which I'd assume the ignition coil amplifies. There is a condenser and contact points in the magneto as well. The external ignition coil has 2 leads plus the spark plug post. One lead goes to ground and the other, I'd assume to the points. Testing on an ohm meter, I get continuity between the 2 leads but nothing between either lead or the spark plug wire post. I am assuming this is bad but I am not sure since I don?t understand the way this ignition system?s coil windings would be.