Sierra 18-5231-1 MagForce 9 Inch Marine Spark Plug Wire Lead, Replaces OMC 582365

The Sierra 18-5231-1 is a 9 inch MagForce marine spark plug wire lead built for outboard ignition systems. It uses a Kevlar core for durability and long service life, paired with a stainless steel wound conductor engineered to support maximum horsepower and engine performance. The wire is finished with premium silicone jacketing and boots that protect against high engine bay temperatures, while also providing superior RFI suppression to keep sensitive onboard electronics from picking up ignition interference.

Both the spark plug and distributor terminals are made from corrosion resistant stainless steel, maintaining strong electrical conductivity even in the salt air and moisture-heavy conditions common to marine use. The wire is finished in white and measures 9 inches in length, making it a direct fit replacement for the original equipment lead it is designed to replace. It is commonly used on outboard spark plug wire applications and is sold individually as a single wire.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5231-1
• Product Line: MagForce Spark Plug Wire Lead
• Length: 9 inches
• Color: White
• Core Material: Kevlar
• Conductor: Stainless steel wound
• Jacketing: Silicone
• Terminal Material: Corrosion resistant stainless steel (spark plug and distributor ends)
• Fit Type: Universal fit
• Weight: 0.1 pounds
• UPC: 808282194079

Fitment

Universal fit spark plug wire; not limited to a specific engine make or model.

Replaces (OEM)

• OMC 582365

Frequently Asked Questions

What is the length of the Sierra 18-5231-1 spark plug wire? The Sierra 18-5231-1 measures 9 inches in length, sized to match the original equipment lead it replaces.

Does the 18-5231-1 replace an OMC spark plug wire? Yes, the Sierra 18-5231-1 replaces OMC part number 582365.

What color is this spark plug wire? It is finished in white silicone jacketing.

What is the core material of the Sierra 18-5231-1? A Kevlar core runs through the 18-5231-1 for added durability and long service life.

Will this wire fit a specific engine make or model? The Sierra 18-5231-1 is a universal fit spark plug wire rather than being limited to one specific engine make or model.

What are the terminal ends made of? Both the spark plug end and distributor end terminals on the 18-5231-1 are corrosion resistant stainless steel for reliable conductivity in marine environments.

Does this spark plug wire help with electronic interference? Yes, the silicone jacketing on the 18-5231-1 provides RFI suppression to reduce interference with sensitive onboard electronics.

How much does the Sierra 18-5231-1 weigh? The Sierra 18-5231-1 spark plug wire weighs 0.1 pounds.

Is the 18-5231-1 sold as a single wire or a set? The Sierra 18-5231-1 is sold as a single 9 inch spark plug wire lead, not a full set.

What is the conductor type used in this wire? A stainless steel wound conductor is used inside the 18-5231-1 to support maximum horsepower and engine performance.

Is the Sierra 18-5231-1 built to handle high engine bay temperatures? Yes, the premium silicone jacketing and boots on the 18-5231-1 provide high temperature protection in the engine bay.

What is the UPC for the Sierra 18-5231-1? The UPC for the Sierra 18-5231-1 spark plug wire is 808282194079.