RCEXL Twin Cylinder Ignition – 120° CM-6 / 10mm Spark Plug Cap (14mm Hex)

Take control of your twin-cylinder RC engine’s performance with the RCEXL 120° Twin Cylinder Ignition System, built for engines using CM-6 / 10mm spark plugs with 9/16" (14mm hex) caps. The 120-degree angled spark plug caps provide flexible installation options, making it ideal for tight engine bays or custom setups.

This high-performance CDI unit is designed for twin-cylinder engines and supports a wide voltage range from 6V to 14.4V. It includes Futaba female connectors for both battery and tachometer integration, and features a smart ignition curve that enhances startup, throttle response, and top-end power.

With automatic timing retard for smoother starts and dual-spark firing at low RPM, this unit ensures consistent ignition and improved engine reliability.

Specifications:

• Engine Compatibility: Twin-cylinder RC gas engines

• Spark Plug Compatibility: CM-6 / 10mm (14mm Hex)

• Plug Cap Angle: 120 degrees

• CDI Unit Weight: 178g

• Operating Voltage: 6V – 14.4V

• Connectors: Futaba Female (Battery & Tachometer)

• Recommended Timing: 30° BTDC

• Startup Timing: Automatically retards to 20° BTDC (100–2000 RPM)

• Timing Curve: Dynamic until 4000 RPM, then fixed at 30° BTDC

• Start Assist: Fires spark plug twice per cycle for easier ignition

Note:
BTDC stands for Before Top Dead Centre—critical for accurate ignition timing.

Please note this does not include Pick up sensor or magnets

Perfect for model aircraft builders who require advanced ignition control, cleaner starts, and smooth power delivery in twin-cylinder configurations.