If you own a Harley Davidson motorcycle with an Evo engine, you may need to understand how to wire the ignition coils properly. The ignition coils are responsible for transforming the battery’s low voltage into the high voltage required to ignite the fuel in your engine.
What is an Evo Engine?
The Evolution engine (Evo) is a V-twin engine produced by Harley-Davidson from 1984 to 1999. It replaced the Shovelhead engine and was replaced by the Twin Cam engine in 1999.
The Evo engine is known for its reliability and power, making it a popular choice for Harley-Davidson riders. If you own a Harley with an Evo engine, it is essential to maintain and troubleshoot the engine properly.
What is a Coil?
A coil is an electromagnetic device that converts low voltage into high voltage. The ignition coil is responsible for creating the spark that ignites the fuel in your engine.
Each cylinder in your Harley-Davidson motorcycle requires a separate ignition coil. These coils need to be wired correctly in order for your engine to operate properly.
Wiring The Ignition Coils
The ignition coils in your Harley-Davidson Evo engine need to be wired according to the wiring diagram. The wiring diagram is a schematic representation of the wiring of your motorcycle.
Follow the wiring diagram carefully, ensuring that each wire is connected to the correct terminal. Use a multimeter to test the continuity of each wire before connecting it to the ignition coil.
It is important to use high-quality ignition coils and wires to ensure proper ignition and to avoid electrical problems.
Wiring Diagram
Below is a wiring diagram for the ignition coil on a Harley-Davidson Evo engine:
| Cylinder | Ignition Coil Terminal | Wire Color |
|---|---|---|
| 1 | Front Cylinder | Yellow |
| 2 | Rear Cylinder | Green/White |
FAQ
What can cause ignition coil failure on a Harley-Davidson Evo engine?
Several factors can cause ignition coil failure on a Harley-Davidson Evo engine, including electrical shorts, overheating, vibration, and moisture.
How do I test an ignition coil on a Harley-Davidson Evo engine?
You can test an ignition coil on a Harley-Davidson Evo engine using a multimeter. Measure the resistance between the primary and secondary terminals of the coil. If the resistance is outside of the manufacturer’s specifications, the coil needs to be replaced.
Do I need to replace all ignition coils at once?
No, you do not need to replace all ignition coils at once. However, it is recommended to replace all coils at the same time to ensure consistent performance.
Can I install aftermarket ignition coils on my Harley-Davidson Evo engine?
Yes, you can install aftermarket ignition coils on your Harley-Davidson Evo engine. However, it is important to choose high-quality coils from a reputable manufacturer to ensure proper operation.
How often should I replace the ignition coils on my Harley-Davidson Evo engine?
The ignition coils on your Harley-Davidson Evo engine should be replaced every 20,000 miles or as recommended by the manufacturer.
