CDI Electronics 414-9564 Mercury Mariner 6 Cylinder Wiring Harness, Inline 6 90/115/140 HP 1979-1989

The CDI Electronics 414-9564 is a replacement wiring harness built for 6 cylinder Mercury and Mariner outboards. It is engineered as a direct, cost-effective alternative to the original equipment harness, restoring proper ignition and electrical connections between the engine's inline 6 cylinder powerhead components without the higher cost of a factory-sourced part.

This harness is designed to fit Inline 6 Engines rated at 90 HP, 115 HP, and 140 HP, covering the 1979-1989 model years for those Mercury and Mariner outboard configurations. Constructed with copper conductors and a polyvinyl chloride (PVC) jacket, it is built to handle the electrical demands of marine ignition systems while resisting the moisture and vibration typical of outboard engine compartments.

As a CDI Electronics product, the 414-9564 is manufactured to the same quality and reliability standards the company applies across its ignition and diagnostic component lines, giving boat owners and marine technicians a dependable option when replacing a worn, corroded, or damaged factory harness on a compatible 6 cylinder Mercury or Mariner outboard.

Specifications

• Brand: CDI Electronics
• Manufacturer Part Number: 414-9564
• Product Type: Wiring Harness
• Compatible Engine: Inline 6 Cylinder Mercury/Mariner Outboards
• Horsepower Fitment: 90 HP, 115 HP, 140 HP
• Fitment Years: 1979-1989
• Material: Copper, Polyvinyl Chloride (PVC)
• Weight: 0.9 pounds
• UPC: 736983854643
• OEM Cross Reference: 84-89564A1, 84-96188A2, 84-96188A4, 89564A1, R84-96188A2, R84-96188A4

Fitment

• Inline 6 Engines, 90 HP, 1979-1989
• Inline 6 Engines, 115 HP, 1979-1989
• Inline 6 Engines, 140 HP, 1979-1989

Replaces (OEM)

• 414-9564
• 84-89564A1
• 84-96188A2
• 84-96188A4
• 89564A1
• R84-96188A2
• R84-96188A4

Frequently Asked Questions

What engines does the CDI 414-9564 wiring harness fit? The CDI 414-9564 is designed for inline 6 cylinder Mercury and Mariner outboards rated at 90 HP, 115 HP, and 140 HP for the 1979-1989 model years.

Is the CDI 414-9564 a genuine Mercury part or an aftermarket replacement? It is a CDI Electronics aftermarket replacement harness, built as a direct, cost-effective alternative to the original equipment wiring harness rather than a Mercury-branded part.

Does the 414-9564 harness cross-reference to any Mercury OEM part numbers? Yes, the CDI 414-9564 replaces OEM numbers 84-89564A1, 84-96188A2, 84-96188A4, 89564A1, R84-96188A2, and R84-96188A4.

What is the 414-9564 harness made of? It is constructed with copper wiring and a polyvinyl chloride (PVC) outer jacket, materials chosen to withstand the marine engine environment.

How much does the CDI 414-9564 wiring harness weigh? The CDI 414-9564 wiring harness weighs 0.9 pounds.

Will this harness work on a 4 cylinder Mercury outboard? No, the CDI 414-9564 is built for 6 cylinder inline engines only; 4 cylinder Mercury outboards use a different harness such as the CDI 414-8672.

Can I use the 414-9564 on a 90 HP, 115 HP, and 140 HP outboard interchangeably? Yes, this single harness, part number 414-9564, is designed to fit the inline 6 engine used across the 90 HP, 115 HP, and 140 HP Mercury/Mariner outboards from 1979-1989.

Why replace a wiring harness instead of repairing individual wires? A worn or corroded harness like the original equivalent of the CDI 414-9564 can develop multiple failure points from age and moisture exposure, so replacing the full harness restores reliable connections throughout the ignition and electrical system rather than patching one wire at a time.

Does CDI Electronics make other harnesses for different cylinder counts? Yes, CDI Electronics also produces a 4 cylinder Mercury/Mariner harness (414-8672); the 414-9564 covered here is specifically the 6 cylinder version.

What is included when I order the CDI 414-9564? You receive the complete CDI 414-9564 wiring harness assembly for the 6 cylinder Mercury/Mariner outboard, ready to install in place of the original harness.

Is the CDI 414-9564 harness backed by manufacturer quality standards? Yes, CDI Electronics manufactures the 414-9564 to its standard ignition and diagnostic component quality control, positioning it as a reliable, cost-effective alternative to OEM-supplied harnesses.