Mercury – NMEA2000 6-Way Junction Box | Network Distribution Block | 84-8M0138268

Overview

Building a clean, reliable NMEA2000 network gets much easier when you use a proper distribution block instead of a string of individual T-connectors. The Mercury 84-8M0138268 NMEA2000 6-Way Junction Box gives you a solid, centralized hub for your backbone, helping reduce clutter, improve durability, and make future expansion far simpler. Designed for any standard NMEA2000 5-pin connector, it supports both male and female termination resistors and drops into any NMEA2000-compatible setup with ease.

Key Features

• 6-Port Network Hub – Provides six NMEA2000 connection points in a single, organized block.
• Cleaner Install – Replaces multiple T-connectors with one durable junction box.
• Standard 5-Pin Compatibility – Works with all NMEA2000-compliant 5-pin connectors.
• Termination Support – Accepts both male and female NMEA2000 terminators.
• Rigid Marine Housing – Built to handle vibration, moisture, and everyday helm conditions.
• Expandable Layout – Makes adding sensors, displays, and modules much easier.

Compatibility

• All NMEA2000 networks using 5-pin connectors
• NMEA2000 engine interfaces, sensors, MFDs, and accessories
• Male or female termination resistors

Performance & Practical Benefits

This junction box creates a streamlined, easy-to-manage backbone that’s far more robust than a chain of plastic T-fittings. The solid housing keeps each port secure, reducing the chance of loose connections or water intrusion. It also makes network troubleshooting and expansion more straightforward—each device has its own dedicated connection point. Whether you're tying in engines, MFDs, sensors, or future add-ons, this box keeps the rigging organized and dependable.

Why Buy OEM

NMEA2000 networks depend on clean connections and stable mechanical support. Mercury’s OEM junction box provides precise pin alignment, rugged construction, and proper sealing around each port. Off-brand blocks often lack the rigidity or connector quality needed for marine environments, which can lead to intermittent dropouts or data errors. The OEM block gives you confidence that your network will stay stable season after season.

FAQ

Q1: Do I still need NMEA2000 terminators?
Yes—this block accepts both male and female terminators as required for your network’s layout.

Q2: Can this replace multiple T-connectors?
Exactly—that’s its main purpose. It simplifies and strengthens your backbone.

Q3: Does it require a Mercury engine?
No. It works with any NMEA2000-compatible system.

Q4: Is installation difficult?
No. Plug in your existing NMEA2000 devices and secure the block in place.

Q5: Does it need a power tee?
If your network requires power injection, you’ll still need a proper NMEA2000 power node elsewhere in the system.