I-78 AUBURN IGNITER (SPARK PLUG) CS12998

The I-78 Auburn Igniter (Spark Plug) CS12998 is a high-quality igniter designed specifically for Auburn central furnaces. Manufactured from 1910 to 2025, this nickel center electrode igniter operates on propane gas and has a power source of 120/240V. With a largest diameter of 1.125 inches and a length of 8.5 inches, this unit is lightweight at .25 lbs and comes with a manufacturer warranty of 3 months. Made in the United States, this igniter is a crucial component for maintaining and repairing HVAC systems in commercial and industrial settings.
Specifications for the Auburn I-78 Igniter (Spark Plug) CS12998

The Auburn I-78 (also referenced as I-78-2 in some catalogs, with SKU/Part Number CS12998 or 12998) is an unshielded industrial spark plug igniter manufactured by Auburn Technologies (a Federal-Mogul brand), designed for reliable ignition in high-temperature combustion systems. It features a robust nickel center electrode for resistance to sparking erosion and chemical corrosion, making it suitable for burners, boilers, furnaces, ovens, heaters, and flare stacks. Established since 1910, Auburn igniters are OEM-standard for major combustion equipment manufacturers.

Key (Variant: I-78-2; SKU: CS12998 / 12998)TypeUnshielded spark plug igniter (surface arc discharge)Thread Size7/8\"-14 NPT (male thread)Center ElectrodeNickel alloy (proprietary Auburn formulation for high thermal conductivity and heat shock resistance)Hex Size15/16\" (for wrench installation)Gap0.125\" - 0.187\" (3.2 - 4.7 mm; adjustable for optimal arc)Overall Length8.5\" (216 mm; shell to terminal)Insulator MaterialAlumina ceramic (excellent dielectric strength and mechanical durability)Terminal Type1/4\"-28 threaded stud (for high-voltage cable connection)Maximum Voltage15,000 V (compatible with standard ignition transformers)Operating TemperatureUp to 1,800°F (982°C) continuous; resistant to thermal cyclingWeight0.25 lbs (0.11 kg)CertificationsUL-listed for industrial use; RoHS compliantReplacement Interval1,000 - 2,000 hours (depending on application; inspect for electrode wear)Additional Notes

• Features: High mechanical strength for vibration-prone environments; low radio frequency interference; easy installation with standard pipe thread sealant. The nickel electrode provides superior longevity over copper alternatives.
• Applications: Ideal for gas-fired industrial burners (e.g., Maxon, Eclipse) and oil/gas ignition systems; cross-compatible with Champion RE-14 or similar OEM parts.
• Maintenance: Clean electrodes periodically; replace if insulator cracks or gap exceeds 0.2\". Use dielectric grease on terminal.