D89D - Crown - CHAMPION SPARK PLUG (1EA)

The Champion D89D Spark Plug is a heavy-duty industrial-grade spark plug designed for use in agricultural, construction, and industrial engines. Here's a detailed breakdown of its specifications and compatible alternatives:

🔧 Technical Specifications:

• Thread Diameter: 18mm
• Thread Reach: 12.7mm (0.5 inch)
• Seat Type: Flat
• Hex Size: 23.8mm (15/16 inch)
• Tip Configuration: Extra projected
• Construction: Special design
• Terminal Type: Removable
• Part Number: Champion D89D / 543 

🔁 Cross Reference Equivalents:

The D89D is interchangeable with several other spark plugs, including:

• ACDelco: 18A
• Autolite: 379
• Bosch: M10AC0
• Champion: 49, 543
• Denso: L14-U (5000)
• Motorcraft: BT15, BTS8F4
• NGK: A6, AB2
• Prestolite: 18-10-01
• Stitt: 82, 8ME, 8MEX

🌟 Applications:

• Commonly used in John Deere, Lincoln welders, stationary engines, and older tractors.
• Suitable for high-compression, high-temperature environments.