E18
Ryobi
Ignition Coil / Ignition Fault
Ryobi controller displays E18 and the generator shuts down unexpectedly.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed ignition coil, Damaged spark plug wire, Loose ignition module connector, Faulty crankshaft position or magneto pickup sensor
How to Fix / Troubleshooting
Safety first: Turn the generator OFF, disconnect the battery negative cable, and allow the engine to cool.
- Inspect spark plug and wire: Remove the spark plug boot and check the wire for cracks or burns. Remove the plug and inspect for fouling or damage. Replace with the exact Ryobi‑specified plug if needed.
- Check ignition coil connections: Locate the ignition coil on the engine. Ensure its primary connector is fully seated and the coil is securely mounted.
- Test for spark (basic): Reconnect the battery, ground the spark plug body to the engine, and crank the engine while observing for a strong blue spark. If no spark is present, the coil or upstream sensor may be faulty.
- Sensor inspection: Inspect the crankshaft position or magneto pickup sensor near the flywheel for damage or excessive gap. Ensure its connector is tight.
- Professional diagnosis: If E18 persists after replacing the plug and inspecting wiring, a technician should test coil resistance, sensor output, and controller ignition drive.
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Repair Difficulty
Hard
4/5
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