Briggs & Stratton 557039 Spark Plug

The Briggs & Stratton 557039 is a genuine OEM replacement spark plug designed for small engines. This nickel-constructed spark plug features a 10mm thread size with a 0.748-inch reach and gasket seat design, requiring a 16mm wrench for installation.

Key Features:

• Genuine Briggs & Stratton OEM part for guaranteed compatibility
• Nickel shell construction for faster heat dissipation
• Copper core design for enhanced heat removal
• Shortened ground electrode exposes spark to air/fuel mixture
• Positioned approximately 1/16 inch into combustion chamber
• Colder heat range helps prevent pre-ignition
• Gasket seat design with 16mm hex size

This spark plug is engineered specifically for Briggs & Stratton engines to deliver reliable ignition performance and help maintain optimal engine operation. Using the correct spark plug is critical for preventing performance problems and potential internal engine damage. Made in the United States.