Sierra 18-28081 Ignition Wire Set for 6-Cylinder Mercury Outboard Engines

The Sierra 18-28081 is an ignition wire set built for 6-cylinder Mercury outboard engines. This set supplies the coil wire and distributor-end wiring needed to deliver spark from the ignition coil through the distributor to each cylinder, restoring consistent firing and easier starts on an outboard where the factory wiring has cracked, arced, or lost insulation integrity over time.

Each wire uses a copper conductor for low-resistance spark transfer, wrapped in Polyvinyl Chloride (PVC) insulation that resists the heat, vibration, moisture, and fuel exposure typical of a marine engine compartment. Because the wires are matched to the coil and distributor routing of a 6-cylinder Mercury outboard, the set installs as a direct match for that cylinder count without cutting, splicing, or re-terminating individual leads.

The set ships as a single complete unit (1 count) so every wire needed for the engine's ignition circuit arrives together, weighing 0.75 pounds. It is intended as a full replacement of the existing ignition wiring rather than a single-wire repair, giving the ignition system uniform resistance and insulation across all cylinders after installation.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-28081
• Number of Cylinders: 6
• Application: Mercury Outboard Spark Plug Wires
• Material: Copper, Polyvinyl Chloride (PVC)
• Number of Items: 1
• Weight: 0.75 pounds
• UPC: 808282341404

Fitment

• 6-cylinder Mercury outboard engines

Frequently Asked Questions

What engines does the Sierra 18-28081 ignition wire set fit? The Sierra 18-28081 is built for 6-cylinder Mercury outboard engines, supplying the coil wire and distributor-end leads for that cylinder count.

How many wires come in the 18-28081 set? It ships as one complete set (1 count) covering the coil wire and distributor-end wiring for all 6 cylinders, not an individual wire.

What material are the wires made from? The 18-28081 wire set uses a copper conductor for spark transfer, insulated in Polyvinyl Chloride (PVC) to resist heat, moisture, and vibration in the engine compartment.

How much does the Sierra 18-28081 weigh? This ignition wire set weighs 0.75 pounds.

Is the 18-28081 a genuine Sierra part? Yes, part number 18-28081 is a genuine Sierra ignition wire set, not a generic aftermarket splice kit.

Does this set include the coil wire? Yes, the coil wire is included along with the distributor-end wiring in the 18-28081 set.

Can this wire set be used on a 4-cylinder or 8-cylinder Mercury outboard? No. The 18-28081 is matched to 6-cylinder Mercury outboard engines; Sierra offers separate part numbers for other cylinder counts.

Why replace the ignition wire set instead of a single wire? Replacing the full 18-28081 set gives every cylinder matching resistance and fresh PVC insulation, which keeps ignition timing and spark strength consistent across a 6-cylinder Mercury outboard rather than leaving older, degraded wires in the circuit.

What signs indicate the ignition wires need replacement? Cracked or brittle PVC insulation, visible arcing, misfires, or hard starting on a 6-cylinder Mercury outboard point to worn ignition wiring that the 18-28081 set is designed to replace.

Is the UPC for the 18-28081 wire set 808282341404? Yes, 808282341404 is the UPC associated with the Sierra 18-28081 ignition wire set.