Is your leaf blower refusing to cooperate just when you need it most? A faulty ignition coil could be the culprit. Although the idea of replacing it might sound intimidating, with the right guidance and tools, you can restore your leaf blower’s performance quickly and effectively.
Common Causes of Ignition Coil Failure
Understanding what leads to ignition coil problems can help you identify issues early and maintain your leaf blower effectively. Here are some common reasons ignition coils fail:
- Overheating: Prolonged operation or poor ventilation can cause the coil to overheat, leading to failure.
- Electrical Overload: Voltage spikes or short circuits can damage the coil’s internal wiring.
- Corrosion or Moisture: Exposure to damp conditions can cause rust or short circuits in the coil.
- Wear and Tear: Regular use naturally degrades components, including the ignition coil.
- Loose Connections: Vibrations from the engine can loosen connections, affecting performance.
Why Replace the Ignition Coil?
The ignition coil is responsible for creating the spark needed to ignite the engine’s fuel. When it malfunctions, the engine may run poorly or not start at all. Recognizing the signs early can save you both time and frustration.
Signs you might need a new ignition coil:
- Inconsistent Performance: If the engine sputters or struggles to run, the coil may not be delivering a steady spark.
- No Spark: A complete absence of spark will prevent the engine from starting, often indicating a coil issue.
How to Identify a Faulty Ignition Coil
Detecting ignition coil problems early can save you time and prevent more serious issues. Here are some signs to look for:
- Difficulty Starting: If the leaf blower takes multiple attempts to start, the coil may not be functioning properly.
- Sudden Stalling: An engine that runs briefly and then dies could point to an intermittent spark issue.
- Unusual Noises: Popping or sputtering sounds during operation can indicate inconsistent firing.
- Reduced Power: A lack of engine power might result from an incomplete spark.
- Check the Spark Plug: If the spark plug appears wet or damaged, it might be a sign of ignition coil trouble.
Testing the coil with a spark tester can help confirm the issue.
Tools You’ll Need
Having the right tools on hand makes the repair process easier. Here’s what you’ll need:
- Torx Bits: Commonly T-20 or T-27 for removing screws.
- Spark Plug Wrench: A ¾-inch socket or a specialized spark plug wrench for removing the spark plug.
- Spark Tester: Useful for confirming whether the ignition coil is producing a spark.
- Business Card or Thick Paper: Ideal for setting the correct air gap between the coil and the flywheel.
- Pliers: Handy for removing grommets and adjusting wires.
Read more: Leaf Blower Maintenance: A Step-by-Step Guide
Safety Precautions
Before starting the repair, prioritize safety to protect yourself and your equipment. Keep these guidelines in mind:
- Work in a well-ventilated area to avoid carbon monoxide buildup.
- Wear insulated gloves to shield your hands from sharp edges and debris.
- Wait until the engine is completely cool before starting any work.
- Avoid contact with moving parts, such as blades or augers.
- Empty the gas tank and use fresh fuel when refilling.
- Avoid touching exposed wires or terminals; use insulating tools or gloves if necessary.
- Keep your workspace clear and well-lit, and keep children and pets away.
- Use safety glasses to protect your eyes from dust, debris, or chemicals.
How to Test and Replace a Leaf Blower Ignition Coil
Follow these steps to check if the ignition coil is working and replace it if needed.
Test the Ignition Coil
- Connect a spark tester between the spark plug boot and the spark plug.
- Pull the starter cord to attempt to start the engine.
- Watch the tester for a spark.
- If there is no spark:
- Inspect the spark plug for damage or improper connections.
- Check the stop switch and wiring for issues.
Prepare for Ignition Coil Replacement
- Disconnect the spark plug wire by removing the spark plug boot.
- Use a spark plug wrench or a ¾-inch socket to remove the spark plug.
Disassemble the Leaf Blower
- Remove the blower housing using a Torx bit (T-20 or T-27).
- Unscrew and set aside the cylinder cover.
- Remove the fan impeller by unthreading the bolts.
Remove the Faulty Ignition Coil
- Unscrew the bolts holding the ignition coil in place.
- Disconnect the ground wire using pliers if needed.
- Remove any grommets or wire sleeves from the old coil.
- Lift the faulty ignition coil out of the blower.
Install the New Ignition Coil
- Transfer any wire sleeves or grommets from the old coil to the new one.
- Position the new coil and align its mounting holes.
- Reconnect the ground wire to the new coil.
- Insert a business card or thick paper between the coil and flywheel to set the air gap.
- Tighten the screws while keeping the coil positioned against the card and flywheel.
- Rotate the flywheel to remove the card without shifting the coil.
Reassemble the Leaf Blower
- Reattach the fan impeller and secure it.
- Replace the cylinder cover and tighten the screws.
- Reinstall the blower housing and secure it using the Torx bit.
- Screw the spark plug back in and tighten it.
- Reattach the spark plug boot snugly.
Test the Leaf Blower
- Set the on/off switch to “on.”
- Pull the starter cord to start the engine.
- Check that the blower runs smoothly and responds as expected.
Read more: How to fix a leaf blower that starts and then stalls
In Summary
When your leaf blower starts acting up, it’s frustrating. Fixing an ignition coil might sound tricky, but with some basic tools and a bit of patience, you can get it working again quickly.
The ignition coil is key to starting and running your blower smoothly. Problems like sputtering, sudden stalling, or no-start situations often point to coil trouble. Recognizing these signs early can save you time and effort.
With this guide, you’ve got everything you need to handle the replacement process confidently. Get your tools, follow the steps, and bring your leaf blower back to life.