Otherwise, the arc wants to jump the windings of the magneto and this will damage the winding insulation, causing premature failure.Ģ. If it’s not equipped with a spark bridge, then always have HT leads and a spark plug attached. This is an internal parts with a large enough gap to the distributor that it can arc there, but won’t arc there when a spark plug (with a smaller gap) is attached. This voltage needs to be able to arc somewhere. When the magneto is turned, it induces a high voltage. Never turn a magneto without having a spark gap on the high-tension leads, or a spark bridge in general on the magneto. First you need to know a few basic principles:ġ. I always find that if a car is not running correctly, it’s best to first look at the ignition for correct timing and adjustment because these are the simplest problems that often give fast results. I want to explain how to simply adjust the magneto to the more-or-less correct timing (enough to run a car) and how to fine-tune it to perfect adjustment. Today's article is about a thing I find on many cars: wrong or slightly wrong timing on the magneto (or battery ignition, but I mostly fettle with magnetos so I will concentrate on that).
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