Is your Craftsman riding lawn mower refusing to start? A faulty ignition coil could be the culprit. This vital component is responsible for sending a spark to the spark plug, igniting the fuel and bringing your mower to life. While replacing an ignition coil might seem daunting, with the right tools and a bit of patience, it’s a job even a novice mechanic can tackle. This guide will walk you through the entire process, from identifying the coil to installing a new one, ensuring you get your lawn mower back up and running smoothly.
Understanding the Ignition Coil
The ignition coil is a small, cylindrical component that sits near the spark plug on your Craftsman riding mower. It acts as a transformer, converting low-voltage battery power into high-voltage electricity needed to generate a spark. A malfunctioning coil can prevent the spark plug from firing, leaving your mower unable to start. Common signs of a faulty coil include:
- Engine cranking but not starting: The engine turns over, but there’s no ignition.
- Difficulty starting: The engine starts intermittently or requires multiple attempts.
- Misfiring: The engine runs rough and unevenly.
Gathering the Necessary Tools
Before diving into the replacement process, ensure you have the following tools on hand:
- New ignition coil: This is crucial. Choose a coil specifically designed for your Craftsman mower model.
- Socket wrench set: You’ll need a socket that fits the spark plug and another to remove the coil mounting screws.
- Wire cutters: These are useful for disconnecting wires from the old coil.
- Wire crimping tool: For securely attaching the new coil’s wires.
- Safety glasses: Protect your eyes from flying debris.
- Work gloves: For a secure grip and protection from sharp edges.
Locating the Ignition Coil
The ignition coil is usually situated near the spark plug on your Craftsman riding mower. To find it:
- Locate the spark plug: This is typically located on top of the engine cylinder head, visible when you lift the hood of your mower.
- Follow the spark plug wire: The wire connected to the spark plug leads directly to the ignition coil.
- Identify the coil: It’s a small, cylindrical component with wires attached to it.
Disconnecting the Old Coil
- Disconnect the battery: This is an important safety precaution to prevent electrical shocks.
- Locate the coil’s wires: There are typically two wires connected to the coil – one for power and one for the spark plug.
- Disconnect the wires: Use wire cutters to carefully cut the wires as close to the coil as possible.
Removing the Old Coil
- Locate the mounting screws: The coil is usually secured with one or two screws.
- Remove the screws: Use your socket wrench to loosen and remove the screws holding the coil in place.
- Remove the coil: Once the screws are removed, gently pull the old coil away from the engine.
Installing the New Coil
- Align the new coil: Ensure the new coil is properly aligned with the mounting holes.
- Connect the wires: Connect the new coil’s wires to the corresponding terminals on the spark plug and the power supply. Make sure to secure the connections with wire crimps to prevent loose connections.
- Secure the coil: Use the mounting screws to fasten the new coil securely in place.
- Reconnect the battery: Once the new coil is installed, reconnect the battery to restore power to the system.
Testing the New Coil
After installing the new coil, you need to check if it’s working correctly.
- Turn the key to the “on” position: This should provide power to the ignition system.
- Check for sparks: With the spark plug wire disconnected, hold the wire end close to a grounded metal surface. When you turn the key to the “start” position, you should see a spark jumping from the wire to the metal.
If you see a spark, the new coil is functioning properly. You can reconnect the spark plug wire and try starting your Craftsman riding mower.
Troubleshooting Tips
If your Craftsman riding mower still fails to start after replacing the coil, there could be other issues:
- Faulty spark plug: A worn-out or damaged spark plug can prevent ignition. Check the spark plug and replace it if necessary.
- Damaged wiring: Inspect the wiring connecting the coil to the spark plug and the battery. Damaged or loose wires can disrupt the electrical signal.
- Fuel issues: A clogged fuel filter or a faulty fuel pump can prevent fuel from reaching the engine. Check these components if the issue persists.
- Engine problems: In rare cases, the engine itself might have a problem, requiring professional diagnosis and repair.
Safety Precautions
- Always disconnect the battery before working on any electrical component of your Craftsman riding mower.
- Wear safety glasses to protect your eyes from flying debris.
- Use insulated tools to avoid electrical shocks.
- Keep children and pets away from the work area.
- Consult the owner’s manual for specific safety instructions for your model.
Conclusion
Replacing an ignition coil on your Craftsman riding mower is a relatively straightforward repair that can be tackled with the right tools and a little bit of knowledge. This guide has provided you with step-by-step instructions to ensure a successful replacement. However, if you feel unsure or uncomfortable performing the task yourself, it’s always best to consult a qualified mechanic for assistance. With proper care and maintenance, your Craftsman riding mower will continue to provide reliable service for years to come.
FAQs
What is a coil on a Craftsman riding lawnmower?
The coil, also known as the ignition coil, is a vital component in your Craftsman riding lawnmower’s ignition system. It acts as a transformer, converting the low voltage from your battery into a much higher voltage needed to create a spark that ignites the fuel-air mixture in the engine’s cylinders. Without a functioning coil, your lawnmower won’t be able to start.
Why would I need to replace the coil on my Craftsman riding lawnmower?
There are several reasons why you might need to replace the coil on your Craftsman riding lawnmower. If your lawnmower is struggling to start, running rough, or not starting at all, a faulty coil could be the culprit. Other signs include misfires, a weak spark, or a complete lack of spark at the spark plugs.
How do I know if my Craftsman riding lawnmower coil is bad?
If you suspect your coil is bad, you can test it with a multimeter. First, disconnect the wire leading to the spark plug and check for continuity between the coil’s primary and secondary terminals. If there’s no continuity, the coil is likely bad. You can also test the coil’s resistance using the multimeter’s ohmmeter function. If the resistance is outside the specified range, it’s another indication of a faulty coil.
What tools do I need to replace the coil on my Craftsman riding lawnmower?
To replace the coil on your Craftsman riding lawnmower, you’ll need a few basic tools. You’ll need a wrench or socket to remove the bolts holding the coil in place, a screwdriver to disconnect the electrical connections, and a wire brush to clean any corrosion or dirt from the coil’s terminals. You may also need a new coil, which you can purchase from your local lawnmower dealer or online.
What are the steps involved in replacing the coil on my Craftsman riding lawnmower?
Replacing the coil on your Craftsman riding lawnmower is a relatively simple procedure. First, disconnect the battery to prevent any electrical shock. Next, locate the coil, which is usually attached to the engine block. Remove the bolts holding the coil in place and disconnect the electrical connections. Carefully remove the old coil and install the new coil in its place. Connect the electrical connections and secure the coil with the bolts. Finally, reconnect the battery and test the engine to ensure it starts and runs properly.
What safety precautions should I take when replacing the coil on my Craftsman riding lawnmower?
When replacing the coil on your Craftsman riding lawnmower, it’s essential to take appropriate safety precautions. Always disconnect the battery before working on any electrical components. Wear eye protection and gloves to protect yourself from potential hazards. Be careful when handling the electrical connections, and avoid touching any metal parts while the engine is running.
What should I do if I am unable to replace the coil on my Craftsman riding lawnmower?
If you’re not comfortable replacing the coil on your Craftsman riding lawnmower yourself, or if you encounter any difficulties during the process, it’s best to consult a qualified technician. They have the experience and expertise to safely diagnose and repair any issues with your lawnmower.