NTI 84738 Spark Ignitor – OEM Ignition Electrode with Gasket (3/16–1/4" Gap).

Product Overview

The NTI 84738 Spark Ignitor (Part No. 6008473801) is an OEM ignition electrode engineered to deliver reliable and consistent spark ignition for NTI high-efficiency boiler systems. Featuring a durable ceramic insulator, precision-formed electrode rods, and a pre-set spark gap adjustable between 3/16" and 1/4", this ignitor ensures stable flame ignition and dependable burner startup.

This replacement kit includes the spark ignitor assembly, mounting gasket, and installation hardware. Designed for long-term durability, the 84738 electrode maintains proper spark intensity to prevent ignition delays, misfires, or burner lockouts.

Features & Benefits

• Genuine NTI OEM spark ignitor for high-efficiency boilers
• Precision electrodes provide reliable spark generation
• Adjustable spark gap (3/16" to 1/4") for strong ignition
• Durable ceramic insulation for high-temperature stability
• Includes mounting gasket for a secure chamber seal
• Restores consistent burner lighting performance
• Direct-fit replacement with included hardware

Specifications

• Part Number: 84738 / 6008473801
• Type: Spark ignitor / ignition electrode
• Spark Gap: 3/16" to 1/4"
• Insulator: High-temperature ceramic
• Includes: Electrode assembly, gasket, screws
• Alternate Part Numbers: 84738-1

Installation Tips

• Disconnect power before any work on the ignition system.
• Verify spark gap is within the 3/16" to 1/4" specification.
• Avoid touching the ceramic insulator with bare hands.
• Clean mounting surfaces before installing the gasket.
• Run a full ignition cycle to verify spark and flame response.

FAQs

What issues does this ignitor fix?
Ignition failure, weak spark, or delayed burner lighting.

Is this an OEM part?
Yes, it is an NTI factory-spec replacement.

Does the spark gap need adjusting?
Yes, verify it is set between 3/16" and 1/4".

Does it include the gasket?
Yes, gasket and screws are included.