Mercury – 5-Pin NMEA 2000 / CAN H Extension Harness | 9 m | 84-879171T10

Overview
Some installs just need a longer run, especially on boats with wide consoles or long rigging tunnels. The Mercury 84-879171T10 Extension Harness gives you nine full meters to work with, which makes it a lot easier to place a GPS antenna or IMU where it actually belongs—out of the clutter and in a spot where it does its job. It’s the kind of cable you reach for when everything is routed neatly, but the last piece still falls just a little short.

Key Features

• 9 Meters of Cable – Plenty of length for bigger layouts and long helm-to-bow runs.
• 5-Pin Micro-C Ends – Standard connector style for NMEA 2000 and Mercury CAN H networks.
• Ideal for GPS/IMU Relocation – Helps find a clean, open mounting spot for better performance.
• Flexible Marine-Grade Jacket – Easy to guide around corners and through tight spots.
• Simple Plug-In Setup – No wiring tricks or adapters—just connect and route.

Compatibility

• NMEA 2000 (Micro-C)
• Mercury CAN H
• GPS antennas, IMU sensors, heading modules, and similar 5-pin devices

Performance & Practical Benefits
Nine meters gives you enough space to route the harness the “nice way” instead of the “only way it fits.” You can follow natural rigging paths, stay clear of moving parts, and keep tension off the connectors. Once plugged in, the network treats it like the original cable—steady readings, no settings to adjust, and nothing extra to think about.

Why Buy OEM
This kind of harness lives in a high-vibration environment, so the connector quality matters. Mercury’s OEM ends stay tight and sealed, which is something cheaper extensions struggle with. A loose or poorly sealed plug is all it takes to create random dropouts, and tracking those down later is no fun. The OEM cable avoids that headache entirely.

FAQ
Q1: Will nine meters hurt the signal?
No. This length is well within what NMEA 2000 and CAN H are designed to handle.

Q2: Can this connect any Micro-C device?
Yes—if it uses a standard 5-pin connector, it’ll work.

Q3: Is the cable stiff?
Not at all. It bends naturally and pulls through rigging chases without a fight.

Q4: Do I need to program anything after installing it?
No. It’s just an extension—plug it in and the network carries on.

Q5: Does it tolerate splash and humidity?
Yes. The OEM connectors are built for marine use and stay sealed in real conditions.