How to test a Chainsaw Ignition coil with a Multimeter


When it comes to ignition coil it is one of the most crucial components of any engine management system and the same is true for the chainsaw ignition coil. As virtually today every modern engine uses the ignition coil that provides the much-needed Spark for the engine’s spark plug. The ignition coil is also very important because it is that inductive coil that is essential for the chainsaw’s ignition system. Its function is simple as it uses the electromagnetic induction that’s help in converting the chainsaw’s minuscule volts it convert it into very powerful volts that are required to generate Spark that is powerful enough so as to jump across the spark plug gap. Although one can say that its purpose and operation is relatively quite simple and passive in nature as compared to the thunderous sound and slashing of the chainsaw. But still, it is a very vital component that is a must for efficient engine operation and its malfunction can result in an array of problems.

When there is a failed ignition coil it can result in an obvious slow down of the speed as well as the power to unexpected engine misfires that can become a reason behind and rendering your chainsaw out of service. Apart from this because of their placement the ignition is often susceptible to harsh conditions such as high heat and vibrations from the engine operation. As time passes it can result in burnout or the developing of increased electrical resistance that can become the cause for the inefficient spark that will obstruct its performance hindering our operations. Here is a step-by-step guide that one can follow to perform a test of the ignition coil and know whether it is in good for bad condition by testing its resistance using a multimeter.


Step 1:

Before we start testing the ignition coil we must know what is the specification of the ignition coil of one’s chainsaw. After that, we need to find out what is the correct resistant reading it’s ignition coil o. It can usually found very easily in the chainsaw’s manual.


Secondly, we need to locate the position of the ignition coil on the chainsaw full stop for that purpose we need to open it and we will find it somewhere on the top of the engine or near it.


Now it needs to be disconnected from the wiring harness of the ignition coil. It can be easily removed by using hand tools. they are very easy to remove and do not require much effort.


Finally, it is time to test the ignition circuit. For which we must connect the positive and negative leads of the multimeter with the positive and negative terminal of the ignition coil. It is easier in some coils when the terminals have been marked positive and negative. And in others, there are just simply two terminals that can be located at the connector. We have to look out for the resistance reading and see if it matches the manufacturer’s specification. In case if the reading is displayed as 0 then it means the ignition and hence it must be replaced to resume its normal functioning.

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Step 5:

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Re-install the ignition coils once you have replaced them if needed. After that one should make sure that it also reconnects all the electrical connectors and puts in place the engine covers and other pieces properly that have been removed.

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Lastly, ignition coils are a very crucial part of the ignition system that can drastically affect the engine’s performance if not working properly. A faulty coil may cause all sort of problem and testing it will help us to determine that our chainsaw stays in running condition. If in case we are having any difficulty doing so so we can always approach a mechanic.

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