The ignition system consists of two magnetos, installed in the rear accessory section of each engine, which distribute the current to the spat plugs through ignition switches, wiring, and a high tension ignition harness.
The Master-Ignition ON-OFF switch is located in the overhead panel, mid-section. It grounds out all four magnetos (both magnetos of each engine) when in the OFF position.
The ignition switch unit is located underneath the overhead panel, and incorporates an ignition switch for each engine. Each engine ignition switch has four positions: OFF, L, R, and BOTH.
The ON position leaves the control of the magnetos to each engine ignition switch. When the engine ignition switch is positioned to L, the left magneto provides ignition for the rear spark plug and the right magneto is grounded. When the engine ignition switch is positioned to R, the right magneto provides ignition for the front spark plugs and the left magneto is grounded. When the engine ignition switch is positioned to OFF, both magnetos for that engine are grounded and both front and rear spark plugs will not fire. When the ignition switch is in the BOTH position, both magnetos for that engine are able to generate current for the ignition system and all spark plug can fire.
