Mercury – 5-Pin NMEA 2000 / CAN H Extension Harness | 4 m | 84-879171T05

Overview
Rigging doesn’t always line up the way you expect, and sometimes a sensor ends up just a little farther from the backbone than planned. The Mercury 84-879171T05 Extension Harness adds four meters of breathing room, giving you enough length to route a GPS or IMU cable cleanly through the dash or along a side panel without forcing a tight bend. It’s an easy way to tidy up the install and place your sensor where it actually belongs.

Key Features

• 4-Meter Extension – A practical amount of extra reach for medium-length routing runs.
• 5-Pin Micro-C Ends – Standard male-to-female connectors for NMEA 2000 and CAN H lines.
• Great for Sensor Placement – Helps GPS or IMU modules sit in a spot with better visibility or alignment.
• Flexible Marine Cable – Handles tight turns, vibration, and general helm movement without fighting you.
• Straightforward Install – Plug it in and route it where you need—no special prep or splicing.

Compatibility

• NMEA 2000 (Micro-C) networks
• Mercury CAN H bus
• GPS antennas, IMU units, heading sensors

Performance & Practical Benefits
The extra length makes routing much easier, especially on boats with larger consoles or deeper wiring cavities. You can guide the harness where it’s protected and out of sight, and it takes tension off the sensor connection. Once installed, the network communicates normally—no lag, no dropouts, just a cleaner and more forgiving harness run.

Why Buy OEM
Mercury’s connectors always fit the way they should, and that matters when the cable lives in a spot that’s constantly shaking and flexing. Off-brand extensions tend to loosen up or let moisture creep in, which leads to the kind of intermittent issues that are tough to track down. OEM harnesses simply hold up better and stay sealed over time.

FAQ
Q1: Can I use this for devices other than GPS or IMU?
Yes—anything with a standard 5-pin NMEA 2000/Micro-C connector.

Q2: Does it affect signal strength?
No. Four meters is well within safe length for clean N2K and CAN H communication.

Q3: Can it be routed through tight rigging tunnels?
Yes. The cable jacket is flexible and made for that kind of space.

Q4: Is it okay for outdoor or exposed areas?
Yes—OEM connectors are sealed for marine use.

Q5: Does it require any setup or configuration?
No. It’s a pure extension cable—plug it in and go.