CDI Electronics 414-8672 Wiring Harness for Mercury/Mariner 30 & 40 Jet HP Outboards (1989-1997)

The CDI Electronics 414-8672 is a replacement wiring harness built for 4 cylinder Mercury outboards, engineered as a cost-effective alternative to OEM-supplied components. It fits Mercury/Mariner 30 Jet HP and 40 Jet HP outboards from 1989-1997, carrying the engine's ignition and electrical connections through a cannon plug connector. The harness uses copper wiring for reliable conductivity and is built to CDI's standard for ignition and diagnostic system components, matching the fit, connection points, and electrical function of the original Mercury harness it replaces.

This harness is a direct swap for a deteriorated, corroded, or damaged factory wiring harness, restoring a clean electrical connection between the engine's ignition system and its wiring circuit. Because it is sourced from CDI Electronics, a manufacturer focused specifically on marine ignition and electrical parts, it is built to work as a factory-equivalent replacement rather than a generic universal harness.

Specifications

• Brand: CDI Electronics
• Manufacturer Part Number: 414-8672
• Fitment (Engine Type): Mercury/Mariner 30 & 40 Jet HP outboards
• Model Years: 1989-1997
• Connector Type: Cannon Plug
• Material: Copper
• Weight: 0.7 pounds
• UPC: 736983854612
• Category: Outboard Electrical Wiring Harness

Fitment

• Mercury/Mariner 30 Jet HP, 1989-1997
• Mercury/Mariner 40 Jet HP, 1989-1997

Replaces (OEM)

• 414-8672
• 84-18672A2
• 84-18672A4
• 84-18672A6
• 84-18672A8

Frequently Asked Questions

What engines does the CDI 414-8672 wiring harness fit? The CDI 414-8672 fits Mercury/Mariner 30 Jet HP and 40 Jet HP outboards built from 1989 to 1997.

Is the 414-8672 an OEM Mercury part or an aftermarket replacement? It is an aftermarket wiring harness manufactured by CDI Electronics, built as a direct, cost-effective replacement for the original Mercury factory harness rather than a Mercury-branded part.

Which OEM part numbers does the CDI 414-8672 replace? This harness replaces Mercury OEM numbers 84-18672A2, 84-18672A4, 84-18672A6, and 84-18672A8, in addition to CDI's own 414-8672.

How much does the CDI 414-8672 wiring harness weigh? The CDI 414-8672 weighs 0.7 pounds.

What type of connector does this harness use? The 414-8672 uses a cannon plug connector, matching the connection style of the factory Mercury 4 cylinder engine harness it replaces.

What is the wiring made of on the CDI 414-8672? The wiring in the CDI 414-8672 harness is copper, providing reliable electrical conductivity between the ignition system and the engine's electrical circuit.

Will the 414-8672 work on a 6 cylinder Mercury outboard? No, the 414-8672 is built for 4 cylinder Mercury outboards; CDI's 414-9564 harness is the separate part number for 6 cylinder engines.

Can I install the CDI 414-8672 myself? The 414-8672 is designed as a direct-fit replacement for the original Mercury 4 cylinder harness, so it installs in place of the factory wiring harness using the same connection points.

Does CDI Electronics make quality ignition and wiring parts? CDI Electronics specializes in marine ignition and diagnostic electrical components, and the 414-8672 is built to deliver the same product quality and reliability as the original equipment it replaces.

What is included when I order the 414-8672? You receive one CDI 414-8672 wiring harness, sized and connectored for a 4 cylinder Mercury/Mariner 30 or 40 Jet HP outboard.

Why replace a wiring harness instead of the whole ignition system? A worn or corroded harness like the 414-8672 can cause ignition and electrical faults on its own; replacing just the harness restores the connection without needing to replace the full ignition system.