How to Test a Chainsaw Coil with a Multimeter

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Here is a manual to help you test a chainsaw coil with a multimeter.

Test the Spark Plug:

You should undo one sparkle plug wire from the spark plug of your chainsaw. In many models, these wires run from the distributor cap to the spark plug. These wires are so easy to discharge because they are held set up by just a couple of bolts.

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Check the Coil’s Ignition Circuits:

The coil of your chainsaw has two circuits: primary and secondary. Connect the positive and the negative leads of the multimeter to the positive and the negative terminals of the coil of your chainsaw. The coil of certain chainsaws has a negative and positive terminal that is noticeably checked – and +. While others have two terminals or two pins that are situated at their connectors.

The normal primary resistance range of the coil of a chainsaw is 0.4 to 2 ohms, yet you should search for the exact primary readings of your chainsaw indicated in your user manual.

The normal secondary resistance range of the coil of a chainsaw is somewhere close to 6,000 and 10,000 ohms, however, you should search for the exact secondary readings of your chainsaw indicated in your user manual.

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Test the Resistance of the coil:

To test the resistance of the coil in your chainsaw which is known as a bench test, take your multimeter and remove the coil from your chainsaw to get simple access to its electrical terminals. Ensure that the motor of your chainsaw is killed and it got an opportunity to cool off before you play out the bench test. You should then disengage the coil from the main wire.

You should take note of the infinite reading that your multimeter is showing. Presently you should discharge the source wire from the spark plug of the chainsaw. Contact one lead of the multimeter to the terminal of the spark plug of your chainsaw and the other lead to the motor ground.

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Measure the Primary and Secondary Coils:

You should establish the leads of your multimeter on the shafts of your primary coil. The distributor of your chainsaw has three electrical reaches, one in the center and two on the two sides. These electrical contacts might be either interior or indented in, or outer or extending out.

You should now turn on your multimeter and contact 1 lead to every one of the external electrical connections. Your multimeter will currently show the resistance of your coil’s primary winding, you should record this reading. The fresher models of the chainsaws have contact designs that can contrast from their usual method.

Next, you should locate the leads of your multimeter on the shafts of your secondary coil. You should keep one lead on one of the external electrical contacts. At that point, you should contact the other lead to where the primary distributor wire interfaces with the internal electrical contact of the coil of your chainsaw.

Your multimeter will presently show the resistance of your coils secondary winding, you should record this reading, carefully.

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