C100 Ignition Coil Assy

C100 Ignition Coil Assembly

⚡ Ignition Coil · HT Coil · CDI Ignition Component · Ignition System

For Moped, Cub & ATV · Fits 139FMB, 147FMD, 147FMF, 150FMG engines

This is the C100 Ignition Coil Assembly (also known as high-tension coil), a core component of the CDI ignition system. It is suitable for Mopeds, Cub series, and ATVs, and fits engines including 139FMB, 147FMD, 147FMF, 150FMG, and similar models.

The ignition coil assembly further boosts the high voltage from the CDI unit, generating tens of thousands of volts to create a high-voltage pulse that travels through the high-tension lead to the spark plug, igniting the air-fuel mixture. Manufactured with high-quality iron core and pure copper windings, it offers excellent insulation, stable output, and ample ignition energy. This assembly is the ideal replacement when the original ignition coil shows signs of aging, leakage, internal short circuit, or open circuit.

This ignition coil assembly fits the following engine models:

• Mopeds - Various 50cc-150cc moped models (underbones, scooters, etc.)
• Cub Series - Honda Cub and clone models
• ATVs - Small-engine quad bikes / kids ATVs
• Dirt Bikes - Small off-road motorcycles
• Other vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines with CDI ignition

• Hard Starting: Insufficient ignition energy, weak spark; engine difficult to start.
• Rough Idle: Unstable ignition energy causes idle fluctuation, hunting, or stalling.
• Poor Acceleration: Ignition cut-out during hard acceleration; vehicle surges; power delivery uneven.
• Engine Stalling: Coil open circuit or leakage when hot; engine stalls suddenly, may restart when cool.
• Weak/No Spark: Testing with spark plug shows weak, red spark or no spark at all.
• Cracked Housing/Leakage: Visible cracks on coil housing; visible sparking in damp conditions.
• Open Circuit: Multimeter shows abnormal primary/secondary resistance (infinite or shorted).

If you experience these symptoms, inspect the ignition coil, high-tension lead, spark plug cap, and spark plug, and replace if necessary.

• OEM Specifications: Manufactured to original electrical parameters and mounting dimensions for perfect fitment.
• High-Quality Iron Core: High-permeability silicon steel core for low magnetic loss and high energy efficiency.
• Pure Copper Windings: Primary and secondary windings use high-purity copper wire for excellent conductivity and low heat generation.
• Superior Insulation: Coils are vacuum-impregnated for excellent insulation, high-voltage resistance, and moisture resistance.
• Stable Output: Consistent voltage output with ample ignition energy for all operating conditions.
• Direct Replacement: Directly replaces aged or damaged original ignition coil without modification.

🔧 Installation Tip

1. Disconnect the battery negative terminal before replacing the ignition coil to prevent short circuits.
2. Verify the coil wiring matches the original (typically two low-voltage wires: positive and trigger/ground).
3. Ensure the coil is securely mounted to prevent vibration damage.
4. When connecting the high-tension lead, ensure it is fully inserted for good contact.
5. Check the spark plug cap resistance (should be approximately 5Ω); replace if abnormal.
6. After installation, start the engine and verify proper ignition function; check for leakage.
7. If starting issues persist, inspect the CDI unit, magneto trigger coil, and wiring.

⚠️ Important Notice: This is a C100 ignition coil assembly, suitable for Mopeds, Cubs, ATVs, and vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines with CDI ignition systems.
Specification Confirmation: Please verify your vehicle uses a CDI ignition system (not contact-point ignition). If unsure, check the original CDI unit.
Installation Notes: Ensure correct wiring connections and secure high-tension lead fit. If problems persist after replacement, inspect the CDI unit, magneto trigger coil, and spark plug. Images are for reference only. The actual product may vary.