![]() ![]() Be careful: this circuit makes use of high voltage. I eventually put timing marks on that mower so I could check it with this timing light before tearing the motor apart and learning it was not running for some other reason. When I hit one of those with my mower, it often sheared the flywheel key. Once we had a yard full of gopher mounds. I decided on an AC circuit because the circuit is simpler and because I can use the light on machines with a magneto ignition where there is likely no battery. Today you can use an Internet search to find replacement parts for xenon timing lights. In a few minutes I had the part numbers I needed and ordered them. To do that, I took the model number from a new unit on the shelf and went to their repair parts store. I got the lens and the xenon flash tube from Sears. Then I went to an electronics supply store and got most of the parts. While I had it, I opened it and made a diagram of the circuit. I borrowed a friend's AC powered timing light to use. They all serve the same purpose but offer different RPM ranges, ability to operate a multi-spark system and offer features such as timing manual advance, a dwell meter, and the possible option to work on four-cylinder, six-cylinder, or eight-cylinder engines.Back in the 1970s I wanted a xenon timing light to replace the nearly useless neon timing light I had. What brand manufacturers offer automotive timing lights?Īutomotive timing lights come in three styles: inductive, digital, and self-powered. Not every timing light is compatible with MSD systems, so be sure to check that the one you want can meet these requirements before purchasing. To properly measure this sequence, the timing light must be able to show the beginning of the sequence. Typically, the distributor only provides a single spark for an ignition sequence, but in MSD systems, there are a series of them disbursed at a specific timing. How do timing lights help multiple spark distribution systems (MSD)? ![]()
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