Sierra 18-5227-1 MagForce 9 Inch Spark Plug Wire, 7mm Copper Core, Replaces Mercury 84-813715A1

The Sierra 18-5227-1 is a premium MagForce marine spark plug wire lead built for Mercury/Mariner outboard engine ignition systems. It measures 9 inches in length with a 7mm copper core wire, designed to be "electronics friendly" so it protects onboard electronic devices and electronic engine controls from RFI (radio frequency interference) and EMI (electro magnetic interference) while still delivering maximum voltage to the spark plug.

Construction features moisture-proof, molded distributor insulators and a high-quality conductive center carrier reinforcement to keep the conductor intact over time. The mag/wire wound core delivers full voltage without generating RFI or EMI, while a high tensile strength membrane and innovative nylon reinforcing tape add durability and heat resistance. The silicone jacket protects the conductor up to 500 degrees F and comes pre-greased for ultimate high-temperature protection on both the jacket and boots. Posi-lock stainless steel terminals resist corrosion and provide maximum conductivity at the connection points.

This exact-fit design is engineered for easy installation and years of trouble-free service, making it a direct replacement wire for the specified Mercury/Mariner outboard ignition application. It is finished in white.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5227-1
• Product Type: Spark Plug Wire
• Length: 9 inches
• Core Diameter: 7mm
• Core Material: Copper
• Jacket Material: Silicone
• Terminal Material: Stainless steel
• Color: White
• Weight: 0.08 pounds
• Recommended Use: Outboard engine ignition systems

Fitment

• Mercury/Mariner outboard engines

Replaces (OEM)

• 84-813715A1

Frequently Asked Questions

What does the Sierra 18-5227-1 spark plug wire fit? The Sierra 18-5227-1 is designed for Mercury/Mariner outboard engine ignition systems.

Is the Sierra 18-5227-1 a direct replacement for Mercury 84-813715A1? Yes, the 18-5227-1 replaces Mercury part number 84-813715A1 and is built as an exact-fit design for easy installation in place of that wire.

How long is the Sierra 18-5227-1 spark plug wire? It measures 9 inches in length.

What is the core diameter of this spark plug wire? The ignition wire's core is 7mm in diameter.

What material is the core made of? The 18-5227-1 uses a 7mm copper core wire for conducting voltage to the spark plug.

Does this wire protect against electronic interference? Yes, the MagForce construction of the 18-5227-1 is electronics friendly, protecting onboard electronic devices and engine controls from RFI and EMI while still delivering maximum voltage.

What is the jacket made of and how much heat can it handle? The wire has a silicone jacket that protects the conductor up to 500 degrees F, and the jacketing and boots are pre-greased for high-temperature protection.

What color is the Sierra 18-5227-1? This spark plug wire is white.

How much does the Sierra 18-5227-1 weigh? The 18-5227-1 weighs 0.08 pounds.

What kind of terminals does this spark plug wire use? It uses Posi-lock stainless steel terminals, which resist corrosion and provide maximum conductivity.

Is this an OEM or aftermarket spark plug wire? The 18-5227-1 is a Sierra aftermarket MagForce ignition wire manufactured as a direct replacement for the Mercury 84-813715A1 wire.

Is installation of the 18-5227-1 straightforward? Yes, its exact-fit design is intended for easy installation and years of trouble-free service on the applicable Mercury/Mariner outboard ignition system.