1968 Evinrude Big Twin, Big Twin Electric, Lark 40 HP Outboards Service Manual, Page 33Get this manual
When the poles of the flywheel magnet sweep past the first and center legs of the magnetic flow is momentarily established in the The temporarily assumes direction through the from the north pole of the permanent magnet to its south poleAs the poles of the magnet sweep further along the in the center leg breaks downThe rapid development and collapse of in the center leg induces an electric charge in the coHsThe current in the primary coil flows through the closed breaker points and sets magnetic of its own in the center leg of the The direction of the momentarily opposes the establishment of reverse in the center leg as the poles of the flywheel magnet reach to the center and third leg of the coilAt this precise moment, the breaker points opened the engine crankshaftThis interrupts the flow of current in the primary current, and the
in the center leg collapses