Sierra 10 Inch Spark Plug Wire, 7mm Copper Core, Pack of 5 (18-5230-9-1)

The Sierra 18-5230-9-1 is a 10 inch marine spark plug wire built with 7mm copper core metallic wire, sold as a pack of 5. It is part of Sierra's MAGFORCE line of ignition wires, engineered to be "electronics friendly" so it protects onboard electronic devices and electronic engine controls from RFI (radio frequency interference) and EMI (electromagnetic interference) while still delivering the maximum amount of voltage to the spark plug. The metallic copper core construction is designed to carry current efficiently and consistently for reliable ignition performance on the water.

Each wire uses an exact fit design intended for straightforward installation and years of trouble-free service, making it a practical choice for routine ignition maintenance or replacing worn, cracked, or high-resistance spark plug wires. Because these wires are sold per package of 5 at a fixed 10 inch length, they suit engines and configurations that call for that specific wire length; Sierra also offers this same wire in a 9 inch version (18-5227-1) and a 22 inch version (18-5229-9-1) for applications requiring a different length.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5230-9-1
• Length: 10 inches
• Wire Gauge: 7mm
• Core Material: Copper
• Wire Type: Metallic core wire
• Package Quantity: 5
• Weight: 0.53 pounds
• Ignition System Feature: Electronics friendly, RFI/EMI protection

Frequently Asked Questions

How long is the Sierra 18-5230-9-1 spark plug wire? The 18-5230-9-1 spark plug wire measures 10 inches in length, which is the fixed length for this specific part number.

How many wires come in a package? The 18-5230-9-1 is sold as a package of 5 spark plug wires, not as a single wire.

What is the wire made of? This spark plug wire is built with 7mm copper core metallic wire, part of Sierra's metallic core wire construction.

What makes this different from a standard spark plug wire? The 18-5230-9-1 is part of Sierra's MAGFORCE ignition wire line, which is designed to be electronics friendly, meaning it protects onboard electronic devices and electronic engine controls from RFI and EMI interference while still delivering maximum voltage to the plug.

Is this wire suitable for a marine ignition system? Yes, the 18-5230-9-1 is designed as a marine ignition system spark plug wire with an exact fit design for easy installation.

What if I need a longer or shorter wire than 10 inches? Sierra offers the same wire construction in other lengths under different part numbers: 9 inches is part number 18-5227-1, and 22 inches is part number 18-5229-9-1. Each is a separate SKU, so order the length that matches your application.

Does the 18-5230-9-1 wire help prevent electrical interference? Yes, this wire is designed to protect electronic devices and electronic engine controls from RFI and EMI while delivering maximum voltage, per its MAGFORCE electronics friendly design.

Is the 18-5230-9-1 easy to install? The wire uses an exact fit design intended for easy installation and years of trouble-free service.

What is in the package? The package contains 5 individual 10 inch, 7mm copper core spark plug wires (part number 18-5230-9-1).

Is this a genuine Sierra part? Yes, part number 18-5230-9-1 is a genuine Sierra spark plug wire from Sierra's MAGFORCE ignition wire lineup.