12 Volt Ignition Coil with Internal Resistor Fits 12 volt ignition systems; compatible with Farmall Cub and model 856 tractors as a direct replacement part. Key benefits Reliable ignition performance: Designed for consistent spark delivery to support stable engine operation. Direct replacement fit: Engineered to match original mounting and electrical connections for straightforward installation. Internal resistor included: Built in resistor simplifies installation and ensures correct current flow for 12 volt systems. Reduces misfires and rough idling: Replaces worn or failing coils to restore smooth starting and steady running. Features and specifications Voltage: 12 volt ignition coil with internal resistor for use in compatible tractor ignition systems. Compatibility: Intended as a replacement for compatible tractor models including Farmall Cub and 856; verify model fit before . Function: Provides the voltage pulse required by the ignition system to ignite the fuel mixture and maintain engine performance. Fit and performance: Designed to meet the fit and electrical requirements of the original equipment for reliable operation. Typical applications Routine maintenance: an aging coil during scheduled service to maintain dependable starting and engine performance. Field : Swap in the coil to quickly restore ignition on tractors used for planting, harvesting, or daily farm work. Restoration and rebuilds: Use as the correct electrical replacement when restoring or rebuilding older tractor engines. Installation and compatibility notes Verify your tractor model and ignition system are 12 volt before ordering. Carefully review product photos and specifications to confirm correct fit and mounting style. If uncertain, compare the existing coil to the replacement part to ensure mounting points and electrical connections match.