Ignition coils are essential components in Briggs & Stratton engines, as they are responsible for transforming the low voltage from the battery into the high voltage needed to create a spark in the spark plug. Here’s a guide on selecting, installing, and troubleshooting an ignition coil for Briggs & Stratton engines:
Selecting the Right Ignition Coil
- Model and Engine Type: Ensure the ignition coil is compatible with your specific Briggs & Stratton engine model and type. Refer to the engine’s manual or specifications to identify the correct part number.
- OEM vs. Aftermarket: Decide whether you want an original equipment manufacturer (OEM) part or an aftermarket option. OEM parts are guaranteed to fit and perform well, but aftermarket parts can be a cost-effective alternative if chosen carefully.
- Compatibility: Some ignition coils are designed to fit multiple models. Check the compatibility list provided by the manufacturer to ensure it will work with your engine.
Installing the Ignition Coil
- Safety First: Ensure the engine is off and disconnect the spark plug wire to prevent accidental starting.
- Remove the Engine Cover: Use a screwdriver or wrench to remove the screws or bolts holding the engine cover in place.
- Locate the Ignition Coil: The ignition coil is typically mounted near the flywheel. Identify its location and note how it is connected.
- Disconnect the Old Coil: Disconnect any wires connected to the old ignition coil and remove the mounting screws or bolts. Carefully take out the old coil.
- Install the New Coil: Position the new ignition coil in place and secure it with the mounting screws or bolts. Connect the wires to the appropriate terminals on the new coil.
- Adjust the Air Gap: The air gap between the ignition coil and the flywheel is critical for proper operation. Use a feeler gauge to set the correct gap, typically specified in the engine’s manual (usually around 0.010 to 0.014 inches).
- Reassemble the Engine: Replace the engine cover and secure it with screws or bolts. Reconnect the spark plug wire.
Troubleshooting Common Issues
- No Spark: If the engine won’t start and you suspect an ignition coil issue, check for a spark by removing the spark plug, reconnecting it to the spark plug wire, and grounding it against the engine block. Crank the engine and look for a spark. No spark may indicate a faulty coil or a problem with the wiring.
- Weak Spark: A weak spark can cause poor engine performance. Check the air gap adjustment, as an incorrect gap can result in a weak spark. Also, inspect the spark plug for wear and replace if necessary.
- Intermittent Spark: If the spark is inconsistent, check the connections to the ignition coil for any loose or corroded wires. Ensure the coil is securely mounted and the air gap is properly set.
- Engine Misfires: Misfires can be caused by a faulty ignition coil. If replacing the coil doesn’t resolve the issue, inspect other ignition system components, such as the spark plug, spark plug wire, and flywheel magnet.
Conclusion
Proper selection, installation, and maintenance of the ignition coil are crucial for the reliable operation of your Briggs & Stratton engine. Always refer to your engine’s manual for specific instructions and specifications. If you encounter persistent issues, consult with a professional technician for further diagnosis and repair.