![]() The principal of operation is that the unit senses the inductive reactance of the primary coil of the magneto when the points are open. It is similar to that which is used in the aeronautical industry to synchronise twin magnetos on piston engines and it has a light and a buzzer to give indication of its status. One sense that is available is hearing, but a simple battery and buzzer will not work because the resistance of the magneto primary coil, which is across the points when they are open, is only a few ohms and the buzzer will operate even with the points open. This can be difficult to do on ones own on a large engine when a lot of effort may be needed to turn the crankshaft, leaving no hands to provide tension on the cigarette paper. This can be done by using cigarette paper between the magneto points so that when crank shaft is turned in the direction of rotation the paper will be released as the points open. With that comes the need to time the magneto to the correct position Before Top Centre. I am interested in the restoration of stationery engines. I would like to see the attachments on the page for the comments rather than just links. It is not as straight forward as I would like to see. I hope this works as I have had great difficulty trying to understand how to put up a post. ![]()
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