Key Features

• Genuine Briggs & Stratton replacement part—engineered to original equipment standards for precise fit and dependable compatibility with Briggs & Stratton ignition systems.
• Secure spark plug connection—ensures consistent ignition and reliable spark delivery between the ignition lead and spark plug.
• Durable, heat‑resistant construction—designed to withstand engine heat, vibration and regular use.
• Protection for ignition lead & spark plug terminal—helps prevent corrosion, arcing and connection issues in challenging operating conditions.
• OEM Part Reference: 66538S—accurate identification and ordering for Briggs & Stratton parts.
• Suitable for multiple Briggs & Stratton lines—Classic Series, Sprint Series, Quattro Series, and selected OHV engines; note that boot fitment varies by engine model and ignition lead type; always verify model, type and code before ordering.

Product Details

• Product Type: Spark Plug Boot
• Brand: Briggs & Stratton
• Part Number: 66538S
• Compatibility: Suitable for selected Briggs & Stratton engines (check model fitment)
• Application: Ignition system repair and maintenance
• Why this OEM boot matters: Provides OEM‑quality fit and dependable spark delivery, suitable for professional servicing and domestic maintenance.

Compatibility

• Classic Series engines
• Sprint Series engines
• Quattro Series engines
• Selected OHV Briggs & Stratton engines
• Important: Spark plug boot fitment can vary by engine model and ignition lead type. Always verify your engine model, type, and code before ordering.