Spark Plug Wires, Boots & Terminals

Shop replacement spark plug wires, boots, clips and terminals for lawn mowers, small engines and outdoor power equipment. This collection includes ignition-wire components used to repair or replace damaged spark plug leads, boots and terminal connections on compatible equipment.

Before ordering, match the original part number, wire diameter, boot style, terminal type and equipment application. Spark plug wire components can look similar but use different conductor sizes, connection methods and mounting designs.

How to Choose the Correct Spark Plug Wire Component

• Check the original part number: Use the number from the old component, engine parts diagram or equipment manual whenever possible.
• Confirm wire diameter: Common ignition-wire sizes include 5 mm and 7 mm. The boot and terminal must fit the wire being used.
• Match the boot design: Straight, angled and manufacturer-specific boots may not interchange.
• Verify the terminal or clip: Some terminals use a positive-lock design while others connect differently to the spark plug or ignition lead.
• Check package quantity: Selected wire, terminal and boot products may be sold in multipacks or bulk lengths.

Spark Plug Boots

Spark plug boots insulate the connection between the ignition wire and spark plug. Replace a boot that is cracked, burned, loose or no longer grips the plug securely. Match the boot to the correct wire diameter and engine application.

Spark Plug Wire

Bulk spark plug wire can be used to repair or fabricate compatible ignition leads. Confirm the required wire diameter, conductor type and length before cutting or installing the wire.

Terminals and Boot Clips

Terminals and clips create the electrical and mechanical connection between the wire, boot and spark plug. Match the terminal to the wire size and original connection style.

Frequently Asked Questions

Can I use a 7 mm boot on 5 mm spark plug wire?

No. The boot and terminal should be matched to the ignition-wire diameter specified for the application.

Why does a spark plug boot keep coming loose?

The internal terminal may be damaged, incorrectly installed or mismatched to the spark plug and wire. Inspect the wire end, terminal and boot together.

Can damaged spark plug wire cause a no-start condition?

Yes. Cracked insulation, a poor terminal connection or an open conductor can prevent reliable spark delivery.

Should I replace the boot and terminal together?

Replace any damaged components and verify that the complete connection is secure. On older equipment, replacing the related worn pieces together can produce a more reliable repair.

Disconnect the spark plug lead before servicing equipment, allow hot engine components to cool, and follow the engine manufacturer’s installation instructions.