Weil McLain 511-330-104 Pilot Assembly

The Weil McLain 511-330-104 Pilot Assembly is a critical OEM component designed for precise ignition within Weil McLain CGi boilers and CGs gas boilers. This pilot burner assembly, often cross-referenced as J992 LYW-7125, provides a consistent and stable flame required for the main burner ignition sequence. Engineering-grade construction ensures the assembly withstands high thermal stress, preventing premature degradation of the pilot orifice and electrode structures. As a direct boiler replacement part, this natural gas pilot assembly maintains the factory-specified millivolt signal or rectification current for the integrated control module, ensuring system safety and operational continuity.

Technical service providers should prioritize this OEM boiler part over universal alternatives to maintain the specific flame geometry required for proper burner carryover. The 511-330-104 is essential for resolving common ignition failures, flame rollout issues, or intermittent lockouts on gas-fired heating systems. Its precision-engineered bracket allows for direct mounting without field modifications, ensuring the sensor and pilot flame are correctly aligned with the main burner port. Integrating this pilot assembly burner kit is the industry-standard method for restoring residential and commercial hydronic system reliability.

• Optimized Ignition Performance: Delivers a consistent flame pattern for reliable boiler ignition and reduced cycle delays.
• Verified Compatibility: Explicitly engineered for seamless integration with Weil McLain CGi and CGs series boilers.
• Durable Material Composition: High-grade alloys resist oxidation and corrosion in high-heat combustion environments.
• Safety Compliance: Maintains OEM combustion parameters to prevent dangerous gas accumulation and flame outages.

What boiler models are compatible with the 511-330-104?
This pilot burner is specifically designed for Weil McLain boiler troubleshooting on the CGi and CGs series. Always verify the specific series and serial number of your unit before installation.

Can this pilot assembly be used for Propane (LP) systems?
The Weil McLain 511-330-104 is typically configured for natural gas. For LP conversions, you must ensure the correct orifice size is utilized per the manufacturer's technical bulletin.

Does this kit include the pilot tubing?
This component typically consists of the pilot burner, electrode, and bracket assembly. Contractors should inspect existing pilot tubing for leaks or kinks and replace it if the structural integrity is compromised.

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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.