When the ignition switch is off the P-lead grounds the magneto, and opens the circuit to the mag when its switched to left or right. What is the P-lead and how does it functionĬonnects the ignition switch to the primary circuit of the magneto. What reduces arcing in the points and also aids the collapsing of the magnetic field in a magneto When the magnet is in the E-gap position, the primary points open, interrupting the current flow in the primary circuit inducing a high voltage in the secondary coil How does a magneto produce the High voltage required to fire a spark plug? Name the 3 main circuits of a high tension magneto systemĪ point a few degrees past neutral position of a rotating magnet Name the components of a high tension magneto system Produces a high voltage that forces a spark to arc across a spark plug gap The engine will run rough or not at all if not timed properlly To improve combustion efficiency and provide redundancy for safety Why are dual magnetos used in the engine ignition system What are possible sources of low pressure compressed air used for starting jet transport A/C equipped with air turbine starters?Ĭompressed bleed air from an already running engineĪ specific number of degrees before the piston reaches top dead center on the compression stroke

What components of the starter-generator require periodic inspection?Ĭommutator and brushes should be inspected for wear beyond operational limitsīetween field and armature windings in starter-generators, which ordinarily receive current for operation in the start modeīoth receive current for operation in the start mode Visually inspecting the wear groove remaining on the brushes How can the remaining service life of starter-generator brushes be determined?

Magneto timing light