How to Change Spark Plugs on a Lawn Mower: Step-by-Step Guide
Changing spark plugs on a lawn mower is important. It keeps your mower running well. In this article, we will show you how to do it. Follow these simple steps.
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Why Change Spark Plugs?
Spark plugs help start the engine. Old or bad plugs make it hard to start. They make the engine run poorly. Changing spark plugs keeps the mower in good shape. It also saves fuel.
Tools You Need
- New spark plug
- Spark plug socket
- Ratchet wrench
- Feeler gauge
- Socket extension (optional)
- Clean cloth
- Gloves
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Steps to Change Spark Plugs
Step 1: Turn Off The Mower
First, turn off the mower. Let it cool down. This is for safety. You do not want to burn yourself.
Step 2: Disconnect The Spark Plug Wire
Find the spark plug wire. It is a thick wire. Pull it off the spark plug. Twist and pull gently. Do not pull the wire itself. Hold the boot at the end of the wire.
Step 3: Remove The Old Spark Plug
Use the spark plug socket and ratchet wrench. Turn the old spark plug counterclockwise. Remove it from the engine. It may be tight. Use a socket extension if needed.
Step 4: Check The New Spark Plug
Look at the new spark plug. Check the gap with a feeler gauge. The gap is the space between the electrodes. It should match your mower’s manual. Adjust the gap if needed.
Step 5: Install The New Spark Plug
Put the new spark plug in the hole. Turn it clockwise by hand. Make sure it goes in straight. Tighten it with the spark plug socket and wrench. Do not over-tighten. It should be snug.
Step 6: Reconnect The Spark Plug Wire
Push the spark plug wire back on. Make sure it is secure. It should click into place.
Step 7: Test The Mower
Turn on the mower. Check if it starts easily. It should run smoothly. If not, check the connections.
Tips for Changing Spark Plugs
- Change spark plugs once a year.
- Use the right type of spark plug.
- Keep the spark plug area clean.
- Wear gloves to protect your hands.
Common Problems
Sometimes things go wrong. Here are some common problems and solutions:
| Problem | Solution |
|---|---|
| Spark plug does not fit | Check the model number. Make sure it is correct. |
| Spark plug is too tight | Use a socket extension. Apply steady pressure. |
| Engine still runs poorly | Check the gap. Check the connections. |
Frequently Asked Questions
How Often Should I Change Lawn Mower Spark Plugs?
Change spark plugs every season or after 25 hours of use.
What Tools Do I Need To Change Spark Plugs?
You’ll need a spark plug wrench, socket wrench, and a gap gauge.
How Do I Know If My Spark Plugs Need Changing?
Look for signs like hard starts, rough idling, or poor fuel economy.
Can I Change Spark Plugs Myself?
Yes, changing spark plugs is a simple DIY task with basic tools.
What Is The Correct Spark Plug Gap For Lawn Mowers?
Check your lawn mower’s manual for the specific gap size, usually 0. 02 to 0. 03 inches.
Why Is My Lawn Mower Not Starting After Changing Spark Plugs?
Ensure spark plug is properly gapped and securely tightened. Check for fuel and air filter issues.
Conclusion
Changing spark plugs on a lawn mower is easy. Follow the steps. Use the right tools. Check the spark plug gap. Your mower will run better. It will last longer. Happy mowing!