Mercury – SC100 Data Harness | 3-Foot SmartCraft Link Extension | 84-8M0210759

Overview

Some helm layouts need a bit more room to space SC100 gauges cleanly, and this extension makes that possible without reshaping the whole rig. The Mercury 84-8M0210759 SC100 Data Harness adds a full three feet of SmartCraft link length, giving you the flexibility to route the cable comfortably behind the dash and place the instruments exactly where they fit best. It keeps the wiring relaxed, helps avoid strain on the connectors, and gives multi-gauge setups a cleaner, easier layout.

Key Features

• 3-Foot Extension – Adds meaningful length for more flexible SC100 gauge placement.
• SmartCraft Data Link – Extends the communication path between SC100 Series instruments.
• Cleaner Routing – Reduces tension on the original harness and opens up behind-dash space.
• OEM Connector Ends – Factory SmartCraft plugs create a dependable, snap-in fit.
• Consistent Data Flow – Maintains steady SmartCraft communication across the extra distance.
• Great for Multi-Gauge Dash Setups – Helps organize layouts where gauges sit farther apart.

Compatibility

• SC100 Series gauges
• SmartCraft data link ports
• Multi-gauge SC100 helm installations

Performance & Practical Benefits

This harness gives you the extra reach needed to arrange SC100 gauges where they’re easiest to read and where they look best. The added length keeps the wiring from being pulled tight, and the routing becomes more natural behind the panel. Once installed, the gauges talk to each other normally, and the whole dash feels more refined and easier to work around.

Why Buy OEM

SmartCraft systems depend on precision—clean connectors, correct pinout, and steady data flow. Mercury’s OEM harness maintains all of that, avoiding the dropouts and loose-fit issues that cheaper extensions often create. The factory connectors stay secure through vibration and regular use, giving you reliable performance season after season.

FAQ

Q1: When is this three-foot extension useful?
When the stock SC100 link won’t comfortably reach between gauges on larger or wider helm layouts.

Q2: Will this affect gauge readings?
No. It simply extends the SmartCraft data pathway.

Q3: Is it only for SC100 gauges?
Yes. It’s designed specifically for SC100 Series linking.

Q4: Do I need tools to install it?
No. It plugs inline with the existing SmartCraft connectors.

Q5: Is this good for tight helms?
Yes. The extra slack helps avoid cramped routing and makes rigging easier.