1. Spark Plug: Make sure the spark plug is properly gapped, clean, and in good condition.
2. Spark Plug Wire: Inspect the spark plug wire for damage or cracks, especially at the ends where it connects to the spark plug and to the ignition coil. Make sure it's securely connected at both ends.
3. Ignition Coil: Check the ignition coil for any loose connections or cracks. Make sure it's properly grounded.
4. Stator: Test the stator to see if it's generating sufficient voltage to power the ignition coil.
5. CDI Unit (Capacitor Discharge Ignition): If your Big Red has a CDI unit, it may be faulty. CDI units can fail over time and can cause intermittent sparking issues.
6. Grounding: Check all grounding connections to make sure they're clean, tight, and free from corrosion.
7. Battery: If your Big Red has a battery, check the battery's voltage and make sure it's fully charged. A weak battery can cause inconsistent sparking.
8. Kill Switch: Make sure the kill switch is in the "Run" position and not accidentally engaged, causing the spark to cut off.
9. Flywheel/Magneto: Check the alignment of the flywheel's timing marks with the marks on the stator or engine case to ensure proper ignition timing.
10. Electrical Connections: Double-check all electrical connections related to the ignition system to ensure they're clean and tight. Loose connections can cause intermittent sparking issues.
11. Compression: Measure the compression of the engine to make sure the engine has enough compression for proper ignition. Low compression can make it difficult for the engine to generate a strong spark.
Remember that electrical issues can be tricky to diagnose, especially without specialized equipment. If you don't feel comfortable troubleshooting these issues yourself, it may be best to consult with a qualified mechanic to ensure proper diagnosis and repair.
