NFSpeeding Spark Plug Wires Set — 6in 6-Pc Marine Replacement for Evinrude/OMC/Johnson, Silicone & Corrosion-Resistant

NFSpeeding's 6-piece 6" high-performance spark plug wire set is a marine-grade replacement designed to restore reliable ignition on Evinrude, OMC and Johnson outboard engines.

These six spark plug wires (part number 18-8816-1 ZF478V) are built for saltwater and freshwater use, combining silicone insulation, corrosion-resistant connectors and low-resistance cores to maintain steady spark delivery under marine conditions. The set replaces worn or damaged ignition leads, helping smooth starts and consistent engine performance during typical boating seasons. NFSpeeding includes six wires sized to match common outboard layouts and offers a 12-month after-sales support period for peace of mind.

How do these wires improve outboard starting and running consistency?

By using a low-resistance conductor and multi-layer shielding, the wires reduce energy loss between the coil and spark plugs, producing stronger, more reliable sparks across all cylinders. Consistent spark timing helps the engine fire evenly at idle and under load, which supports smoother acceleration and steadier RPMs.

• Low-resistance core for efficient energy transfer
• Multi-layer shielding minimizes electromagnetic interference
• Precision length (6") to fit common outboard routing without stretching

Are these spark plug wires built to resist marine conditions?

Yes — the NFSpeeding wires use marine-grade silicone insulation and corrosion-resistant connector compounds to resist salt, humidity and UV exposure. That construction prolongs service life compared with standard automotive wires when used on boats and in damp environments.

• Marine-grade silicone resists cracking and UV degradation
• Anti-corrosion terminals protect electrical contact points
• Weather-resistant design suited for prolonged marine exposure

Which engines and applications are these wires compatible with?

This 6-piece set lists compatibility with Evinrude, OMC and Johnson outboards and includes the referenced part number 18-8816-1 ZF478V. The 6" length and connector type match common ignition layouts on many small- to mid-sized outboard motors, making it a direct-replacement option for maintenance and repair.

• Compatible with Evinrude, OMC and Johnson outboard models
• Pack of six wires for typical multi-cylinder outboard heads
• Part number reference included for cross-checking fit

What should I expect from installation and aftercare?

Installation is straightforward for anyone comfortable working on outboard ignition systems: remove old leads one at a time, route new wires to avoid heat and sharp edges, and ensure secure terminal connections. NFSpeeding advises routine inspection and offers a 12-month after-sales maintenance window if issues arise after purchase.

• Swap wires one at a time to preserve firing order
• Route away from exhaust and moving components to prevent damage
• NFSpeeding provides 12 months of after-sales support

Who is this for: boat owners, marine technicians and DIY mechanics seeking a full six-piece ignition lead replacement for Evinrude, OMC or Johnson outboards. It suits anyone preparing their outboard for the season, replacing weathered wires, or upgrading to marine-grade leads for more consistent starts and longer service life.