Spark Plug Champion RH-18-Y - Crown

The Champion RH-18-Y Spark Plug (also known as part number 857) is a Copper Plus spark plug designed for small engines and lawn equipment. Here's a detailed breakdown of its specifications:

🔧 Technical Specifications:

• Part Number: RH18Y / 857
• Thread Size: 14mm
• Thread Reach: 11.2mm (0.44 inch)
• Hex Size: 13/16 inch (20.6mm)
• Seat Type: Gasket
• Heat Range: 18
• Preset Gap: 0.025 inch (0.64mm)
• Center Electrode Tip Material: Nickel
• Ground Electrode Tip Material: Nickel
• Electrode Design: Standard copper core
• Number of Ground Electrodes: 1
• Resistor Type: Yes
• Applications: Small engines including lawn mowers, snow blowers, chainsaws, and leaf blowers  

🌟 Features:

• Copper Core: Enhances conductivity and heat control
• Durability: Resists fouling and corrosion
• Built to Standards: ISO and SAE compliant