Weil McLain 511-330-218 Pilot Assembly Kit

The Weil McLain 511-330-218 Pilot Assembly Kit is a critical OEM component designed for intermittent pilot ignition systems in specific residential gas boilers. Engineered for high-temperature durability, this kit is primarily compatible with Weil-McLain CGa (Series 1 & 2), CG, CGx, and EG series boilers. It serves as a direct internal replacement to ensure precise flame rectification and reliable main burner light-off. This assembly is specifically configured for natural gas boilers; please note that it is not intended for use with propane conversions.

This comprehensive service kit includes a precision-drilled pilot orifice, flexible aluminum pilot gas tubing, and factory-terminated spark and sense wires. By replacing the entire assembly, technicians eliminate common failure points such as carbon buildup on the igniter-sensor or brittle insulation on high-voltage leads. This ensures the ignition control module receives a clean microamp signal, preventing nuisance lockouts and erratic boiler cycling. Each component meets original factory specifications for fitment and gas flow rates, maintaining the atmospheric burner's operational integrity.

• OEM Compatibility: Exact drop-in replacement for Weil-McLain 511-330-218, ensuring proper alignment with the burner tray.
• Complete Service Kit: Includes the pilot burner, orifice, and 36-inch leads for rapid field installation.
• Signal Reliability: High-grade sense wire ensures consistent flame detection to the control board, reducing service callbacks.
• Durable Construction: High-temperature aluminum tubing and ceramic-insulated electrodes withstand the harsh combustion environment.

Which boiler models use the 511-330-218 kit?
This kit is the standard pilot burner assembly for Weil-McLain CG, CGa (Series 1, 2, and 3), CGx, and EG (Series 4) boiler models utilizing spark-to-pilot ignition.

Can I use this assembly with LP / Propane gas?
No, this specific part number is calibrated for natural gas. Propane units require a different orifice and assembly configuration to match the higher BTU content and pressure requirements.

Does this kit include the ignition cable?
Yes, the kit is fully populated with the spark wire for ignition and the sense wire for flame proving, along with the necessary pilot gas line.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.