Cessna 172 Magneto Wiring Diagram

Cessna 172 Magneto Wiring Diagram

The Cessna 172 is a popular single-engine, four-seat, light aircraft manufactured by Cessna. It is one of the most-produced aircraft in history, with over 44,000 built. The 172 is powered by a Lycoming O-320 engine, which uses two magnetos to provide spark to the spark plugs. The magnetos are located on the engine and are connected to the engine by wires. The magneto wiring diagram for the Cessna 172 is shown below. The diagram shows the location of the magnetos, the wires that connect them to the engine, and the switches that are used to control the magnetos.

Magneto Wiring Diagram

Cessna 172 Magneto Wiring Diagram The magnetos are located on the front of the engine, on either side of the carburetor. The primary magneto is connected to the engine by a red wire, and the secondary magneto is connected by a blue wire. The magnetos are also connected to the ignition switch by a yellow wire. The ignition switch has three positions: *

OFF:

The ignition switch is in the OFF position when the key is turned to the left. In this position, no power is supplied to the magnetos. *

LEFT:

The ignition switch is in the LEFT position when the key is turned to the right. In this position, power is supplied to the primary magneto. *

RIGHT:

The ignition switch is in the RIGHT position when the key is turned all the way to the right. In this position, power is supplied to both magnetos. When the ignition switch is in the LEFT or RIGHT position, the magnetos will provide spark to the spark plugs. The spark plugs will fire in the following order: *

1:

Front Left *

2:

Rear Left *

3:

Front Right *

4:

Rear Right The magnetos are used to provide backup power in case the battery fails. If the battery fails, the ignition switch can be turned to the LEFT or RIGHT position to provide power to the magnetos. The magnetos will continue to provide spark to the spark plugs, allowing the engine to continue running. ## Conclusion The magneto wiring diagram for the Cessna 172 is a simple diagram that shows the location of the magnetos, the wires that connect them to the engine, and the switches that are used to control the magnetos. The diagram is easy to understand and can be used to troubleshoot any problems with the magnetos.


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