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How to Test Small Engine Ignition Coil With Multimeter [5 Methods to Follow]

Nothing happens when you crank the key! Batteries and engines frequently have faulty ignition coils. Check the fuse and it won’t work!

You now know the issue is the ignition coil. Don’t worry at all! We’re here to assist you.

How to test a small engine ignition coil with a multimeter?

First, check the ignition coil’s resistance value in the table inside the user’s manual. Plug the multimeters both end in the spark plug cap,1st on the coil’s base and the next on the high-tension lead. You will get a resistance value within the range of the users’ manual of the multimeter

If you have a few minutes, we’ve written a full essay to walk you through each of these stages in detail.

Let’s get on the wagon and get started!

What Are the Methods to Test Small Engine Ignition Coil 

The procedure below details all of the processes necessary to test the coil with a multimeter and replace it with a new one, reviving the engine.

Method 1. Remove the Small Engine’s Ignition Coil

Step 1. Location of the Ignition Coil

The flywheel magnet is the place where you will find the ignition coil .

There are a lot of small engines used in the lawnmower for example. A lawnmower is extremely useful in our household. It is essential to understand lawnmower maintenance.

Step 2. Get Rid of the Plastic Wrap

First,  with the help of a screwdriver, loosen the screws from the plastic covering of the engine.

Step 3. Track Down the Ignition Coil

The next step is to remove the engine cover that covers the gas tank. An ignition coil should now be visible.

Step 4. Take out the Lead

Remove the ignition coil’s high-tension information from the spark plug, as well as the spark plug from the power tool.

Step 5. Take out the Kill Wire

Using pliers, remove the kill wire connected to the ignition coil.

Step 6. Remove the Coil

The ignition coil can now be quickly removed from the engine. Please remove it from the power tool so that it can be tested!  

You must know how to remove the coil of your power tool.

Method 2. Check the Ignition Coil, Using a Multimeter

The method for testing the ignition coil is simple. All you’ll want is a multimeter as well as the engine’s service handbook.

  • Set the multimeter’s resistance measurement mode to 20K.
  • Now, locate the owner’s manual for the servicing engine. One can be found online.
  • The resistance/tolerance table for the ignition coil can be found in the user’s handbook.
  • A multimeter can now be inserted into one end of a spark plug cap while another end is placed on a coil base.
  • The multimeter should provide a resistance reading that falls within the range of values listed in the user’s guide.
  • Take your multimeter and place one end on the coil’s base and one end on one of its terminations.
  • Similarly, the multimeter must provide a resistance value that falls within the range of the amount mentioned in the user’s manual.
  • When inserting the multimeter’s terminals on the ignition coil’s precise locations, keep a sharp eye out for specific values in the table.
  • Similarly, insert one end of the multimeter into the spark plug cap and the remaining end into the kill wire terminal. Note the value.
  • Assume the multimeter gets results that are not within the range of the values listed in the user manual’s table or produces no results at all. In that case, your coil is faulty and needs to be replaced.

Method 3: Replace the Ignition Coil With a New One

Now that you’ve seen the ignition coil fail the test. You’ve decided that the only alternative is to buy a new one and toss the old one! 

When doing so, make sure that the new coil you buy matches the one you’re replacing. The critical thing to remember is whether one or both of your coils were defective. If both coils are faulty, they must be replaced with new ones.

In this process, consulting the small engine user handbook and obtaining the engine number for your power tool is also a viable choice. Always request that the vendor give you the coil for your specific model of the engine before making a transaction.

An ignition coil comes in many varieties. This is what you’ll discover.

You can purchase your ignition coil from these recommended products below:

Product 1
Product 2

These would be the best available on the market. So you can use it without hesitation!

Method 4: Install a New Ignition Coil

Are you bored of checking? You’re almost there with getting your small engine back up and running. Last but not least, replace the coil in the engine.

First, replace the spark plug. Reconnect the death wire to the ignition coil’s kill wire terminal. Try to know the difference between black and white wires. This can help you to clarify which one is death wire or kill wire. 

Next, connect the coil’s spark plug cap to the plug. Reinstall the coil’s screws and tighten them slightly with the screwdriver. 

This is the most important step of the installation, so pay attention! The flywheel coil-to-magnet distance must be kept at 10 points. So, insert a gauge between both the coil as well as the magnets, and then completely tighten the coil’s screws. 

No gauge? Not to fear, we have one pro tip. Our business cards might sometimes keep us at a distance. So it can be utilized for work.

Method 5: Put the Small Engine Through Its Paces With the New Ignition Coil

After a long day of work, why not put the small engine through its paces in your household? Replace the key and turn on the ignition. 

You can use the best manual impact driver for this purpose. By using the screwdriver you can do the work perfectly.

What do you think? The engine has started and is buzzing as if it were brand new! You can enjoy your day while also making your work easier.


Question: How do I test the spark plug on my lawnmower?

Answer: Test the spark plug with a multimeter in resistance mode. Place one multimeter terminal on either end of the spark plug. If multimeter resistance is below 10,000 ohms, your spark plug is fine.

Question: Small engine coils need how many ohms?

Answer: An ignition coil’s resistance should be between 2.5 and 5k ohms. Assure that perhaps the multimeter’s main lead is in perfect contact with the spark plug location.

Question: What different voltage should have been applied to the coil’s negative side?

Answer: If the ranks are closed, the coil’s negative voltage is zero. Unless they are open, the output is 12. While using electronic ignition as well as the motor is off, the coil’s terminal voltage is 12 volts.

Final Words

You’ve made it all the way to the end! I hope I was able to assist you in determining how to test a small engine ignition coil.

Do take certain precautions when conducting the test. Any feedback would be greatly appreciated.

Have a great day!