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Magneto timing light1/14/2023 ![]() If, after removing/disconnecting the condensor, the light will go out as the distributor body is rotated, this means your condensor is bad (shorted). You could test for that by disconnecting the condensor. Either the points contacts are not opening, or the condensor has failed and is providing a path to ground. If you test it this way and the test light never goes out, it means that there is still a path from the white/black wire to ground. As you rotate the body of the distributor clockwise, the shaft lobe will open the contacts, there will no longer be a path through the points to ground, and the test light will go out. Connect a suitable timing light across the main breaker points and turn the magnet in its normal direction of rotation 10 as indicated by the pointer. So, when the points are closed power will flow from the fuse box, through the test light to the ungrounded distributor contact across to the other contact, and back to ground. As Jim mentioned, your timing will be at full advance any time the engine is running. The white/black wire connects to one of the breaker points and the other breaker point is grounded. Yes, the timing light will work fine on a magneto. He unplugs the distributor's white/black wire from the coil and connects one end of the test light to this wire (connect to the distributor's wire, not to the coil low side), and connects the other test lamp lead to a 12V source (fuse box). The way John Twist shows in his video will work fine. The idea is that you're just using the test light to see if the points are open or closed.
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