What To Know
- Connect the positive probe of the multimeter to the primary terminal of the ignition coil (usually marked with a “P” or “+” symbol).
- Disconnect the positive probe from the primary terminal and connect it to the spark plug wire terminal on the ignition coil.
- However, for a more accurate diagnosis, it is better to remove the coil and test it on a bench.
Ignition coils play a pivotal role in the smooth functioning of any internal combustion engine. For Kohler engines, the ignition coil is responsible for generating the high-voltage spark that ignites the fuel-air mixture in the combustion chamber. When an ignition coil malfunctions, it can lead to a range of engine problems, including misfiring, reduced power, and difficulty starting. Fortunately, testing a Kohler ignition coil with a multimeter is a straightforward process that can help you quickly diagnose and address the issue.
What You’ll Need:
- Kohler ignition coil
- Multimeter
- Spark plug wire
- Ground wire
Safety Precautions:
Before you begin testing, ensure you take appropriate safety precautions. Disconnect the negative terminal of the battery to prevent electrical shock. Wear gloves and safety glasses to protect yourself from sparks or debris.
Step-by-Step Guide:
1. Remove the Ignition Coil: Disconnect the spark plug wire and any other wires connected to the ignition coil. Use a wrench to loosen the bolts or screws securing the ignition coil and remove it from the engine.
2. Connect the Multimeter: Set the multimeter to the ohms (Ω) setting. Connect the positive probe of the multimeter to the primary terminal of the ignition coil (usually marked with a “P” or “+” symbol). Connect the negative probe to the secondary terminal (marked with an “S” or “-” symbol).
3. Measure Primary Resistance: The primary resistance of a Kohler ignition coil typically ranges from 0.5 to 2 ohms. Record the resistance reading displayed on the multimeter.
4. Measure Secondary Resistance: Disconnect the positive probe from the primary terminal and connect it to the spark plug wire terminal on the ignition coil. Reconnect the negative probe to the secondary terminal. The secondary resistance should typically be between 5,000 and 10,000 ohms. Record the reading.
5. Check for Continuity: Set the multimeter to the continuity setting. Connect one probe to the primary terminal and the other probe to the secondary terminal. If the multimeter beeps, it indicates continuity, which is essential for proper ignition.
6. Inspect for Damage: Visually inspect the ignition coil for any cracks, burns, or damage to the insulation. If you notice any damage, replace the ignition coil.
7. Reinstall the Ignition Coil: If the ignition coil passes all the tests, reinstall it on the engine. Tighten the bolts or screws securely and reconnect the spark plug wire and any other wires.
Troubleshooting:
- Low or No Primary Resistance: This indicates a break in the primary winding of the ignition coil. Replace the coil.
- High Secondary Resistance: This suggests a break in the secondary winding. Replace the coil.
- No Continuity: This means there is no electrical path between the primary and secondary windings. Replace the coil.
- Excessive Resistance: High resistance in either the primary or secondary winding can hinder proper ignition. Replace the coil.
Maintenance and Prevention:
To ensure optimal performance and longevity of your Kohler ignition coil, follow these maintenance tips:
- Regularly inspect the ignition coil for any damage or corrosion.
- Clean the ignition coil terminals using a wire brush or sandpaper.
- Apply a small amount of dielectric grease to the terminals to prevent oxidation.
- Replace the ignition coil if it shows signs of wear or malfunction.
Wrapping Up:
Testing a Kohler ignition coil with a multimeter is a simple and effective way to diagnose ignition problems. By following the steps outlined in this guide, you can quickly determine if the ignition coil is faulty and take the necessary steps to resolve the issue. Remember to take appropriate safety precautions and consult an experienced mechanic if you encounter any difficulties.
Frequently Asked Questions:
Q: How often should I test my Kohler ignition coil?
A: It is recommended to test your ignition coil every 12,000 to 15,000 miles, or as per the manufacturer’s maintenance schedule.
Q: Can I test the ignition coil without removing it from the engine?
A: Yes, you can perform a continuity test on the ignition coil without removing it. However, for a more accurate diagnosis, it is better to remove the coil and test it on a bench.
Q: What are the symptoms of a faulty Kohler ignition coil?
A: A faulty ignition coil can cause misfiring, reduced engine power, difficulty starting, and increased fuel consumption.
