Easy fix: how to diagnose and repair faulty leaf blower ignition coils

Maintaining a well-functioning leaf blower is crucial for efficient yard work. One essential component that often requires attention is the ignition coil. If you’re experiencing difficulty starting or running your leaf blower, testing the ignition coil is a vital step in troubleshooting. Here’s a comprehensive guide to help you diagnose and resolve ignition coil issues:

Understanding the Ignition Coil

The ignition coil is a transformer that converts low-voltage electricity from the battery into high-voltage electricity necessary to create a spark at the spark plug. This spark ignites the fuel-air mixture in the combustion chamber, starting the engine.

Symptoms of a Faulty Ignition Coil

Several symptoms can indicate a faulty ignition coil:

• Difficulty starting or running the engine
• Intermittent engine stalling
• Reduced engine power
• Spark plug damage

Safety Precautions

Before testing the ignition coil, ensure you follow these safety precautions:

• Wear gloves and safety glasses.
• Disconnect the spark plug wire from the spark plug.
• Keep the ignition coil away from flammable materials.

Tools Required

• Multimeter
• Spark plug socket wrench
• Dielectric grease

Step-by-Step Testing Procedure

1. Visual Inspection:

Inspect the ignition coil for any visible damage, such as cracks, burns, or corrosion. If you notice any abnormalities, replace the coil immediately.

2. Continuity Test:

• Set the multimeter to the ohms setting (Ω).
• Touch one probe to the primary terminal of the ignition coil and the other probe to the ground terminal.
• A reading of 0.1-1.5 ohms indicates a good primary winding.
• Repeat the test for the secondary terminal, touching one probe to the secondary terminal and the other probe to the spark plug wire terminal. A reading of 5,000-10,000 ohms indicates a good secondary winding.

3. Resistance Test:

• Set the multimeter to the resistance setting (kΩ).
• Measure the resistance between the primary terminal and the ground terminal. A reading of 0.5-2 kΩ is acceptable.
• Measure the resistance between the secondary terminal and the spark plug wire terminal. A reading of 10-20 kΩ is acceptable.

4. Spark Test:

• Reconnect the spark plug wire to the spark plug.
• Hold the spark plug against the engine block with the spark plug gap facing away from you.
• Pull the starter cord or crank the engine.
• If the ignition coil is functioning correctly, you should see a strong spark across the spark plug gap.

Troubleshooting Common Issues

No Spark:

• Check the spark plug and spark plug wire for damage or loose connections.
• Replace the ignition coil if the spark plug and wire are in good condition.

Weak Spark:

• Clean the spark plug and spark plug wire terminals.
• Apply dielectric grease to the terminals to improve conductivity.
• Replace the ignition coil if the spark remains weak.

Replacement and Maintenance

• If the ignition coil is faulty, replace it with a new one of the same type and specifications.
• Apply a thin layer of dielectric grease to the ignition coil terminals before installation.
• Inspect the ignition coil and spark plug regularly for signs of wear or damage.

Tips for Extending Ignition Coil Life

• Avoid using the leaf blower for extended periods without cooling breaks.
• Keep the engine clean to prevent overheating.
• Use high-quality spark plugs and spark plug wires.

Final Thoughts: Ensuring Optimal Leaf Blower Performance

Testing the leaf blower ignition coil is a crucial step in diagnosing and resolving engine problems. By following the steps outlined in this guide, you can determine the condition of your ignition coil and take appropriate action to ensure optimal leaf blower performance.

Frequently Asked Questions (FAQs)

1. Can I test the ignition coil without a multimeter?

Yes, you can perform a spark test to check for spark. However, a multimeter provides more accurate and detailed information.

2. What is the typical lifespan of a leaf blower ignition coil?

Ignition coils typically last for several years with proper maintenance. However, factors such as operating conditions and engine type can affect their lifespan.

3. How often should I inspect the ignition coil?

Inspect the ignition coil annually or as needed if you experience engine problems.

4. Can I repair a faulty ignition coil?

It is not recommended to repair a faulty ignition coil. Replace it with a new one for optimal performance and safety.

5. What is the difference between an internal and external ignition coil?

Internal ignition coils are mounted inside the engine, while external ignition coils are mounted outside the engine. Internal coils are more compact and protected from the elements, while external coils are easier to access and replace.