Riello Block Electrode 3005721 R40 Mectron 2 3

Grant RBS97 Worcester 87161092640

The Riello Block Electrode 3005721 is a genuine OEM ignition electrode assembly designed for use with Riello R40 and Mectron 2 & 3 oil burners. This component delivers a precise and reliable spark to ignite the fuel-air mixture within the burner’s combustion head, ensuring fast, consistent ignition and efficient burner performance. Engineered to Riello’s strict manufacturing standards, the 3005721 electrode block guarantees compatibility, durability, and safe operation in both domestic and light commercial heating systems.

Key Features

• Genuine Riello ignition electrode block – Part No. 3005721

• Suitable for: R40 and Mectron 2 & 3 burner models

• Provides accurate spark positioning for reliable ignition

• High-temperature ceramic insulation for safety and durability

• Delivers consistent spark energy under all operating conditions

• Direct OEM replacement – no modification required

• Ensures clean, stable ignition and reduced startup failures

• Manufactured to Riello’s original equipment standards

Compatibility

• Compatible with Riello R40, Mectron 2, and Mectron 3 oil burners

• Used in systems from Grant, Worcester, Firebird, Warmflow, and Trianco

• Designed for use with standard Riello ignition transformers and electrodes

When to Replace

• If the burner fails to ignite or misfires

• When ceramic insulator is cracked or electrodes are worn

• During burner servicing, rebuild, or scheduled maintenance

Technical Specifications

• Manufacturer: Riello

• Part Number: 3005721

• Type: Ignition electrode block assembly

• Compatibility: R40, Mectron 2, Mectron 3

• Material: High-grade metal with ceramic insulation

• Function: Provides spark ignition for oil burner combustion

• Application: Domestic and light commercial oil-fired heating systems