Mercury – Harness Extension (10-Pin) | 6-Foot Instrument Drop Extension | 84-8M0058668

Overview

Instrument drops can come up short fast, especially on wider consoles or when rerouting controls during a repower. The Mercury 84-8M0058668 Harness Extension gives you six extra feet on a 10-pin SmartCraft instrument drop, making it easier to reach gauges, controls, or helm devices without stretching the original harness. It installs cleanly and keeps the network tidy, even in tight or unusually shaped rigging paths.

Key Features

• 6-Foot Extension – Adds meaningful length to SmartCraft instrument drop runs.
• 10-Pin SmartCraft Design – Extends any standard 10-pin instrument connection point.
• Side Mount Compatible – Works with Mercury Side Mount controls that use a 10-pin drop.
• 896537 Harness Ready – Designed to extend any 896537-series main engine or boat harness.
• OEM Plug-In Connectors – Factory SmartCraft ends provide a clean, secure fit.
• Stable Data Path – Maintains proper SmartCraft communication across the added distance.

Compatibility

• 10-pin SmartCraft instrument drops
• Side Mount control harnessing
• 896537-series Mercury engine/boat harnesses
• SmartCraft CAN P network devices

Performance & Practical Benefits

This extension makes it easier to route instrument wiring without forcing tight bends or stretching the original harness. The extra six feet gives you enough slack to reach across consoles, behind panels, or around rigging channels that weren’t designed with SmartCraft in mind. Communication stays clean, gauges respond normally, and the whole rig looks and functions better with the added flexibility.

Why Buy OEM

SmartCraft relies on precise connectors and proper shielding to avoid data noise and intermittent faults. Mercury’s OEM extension harness preserves those specs, ensuring every pin carries the correct signal without interruption. Cheaper cables often fit loosely or degrade over time, but the factory harness keeps the system stable season after season.

FAQ

Q1: When would I need this six-foot extension?
If the existing 10-pin drop won't comfortably reach the helm or instrument panel, this extension fills the gap.

Q2: Does the added length affect SmartCraft signals?
No. The harness is built to carry all 10 pins cleanly across this distance.

Q3: Will it work with Side Mount controls?
Yes. It’s designed specifically to extend 10-pin drops used with Mercury Side Mount controls.

Q4: Is it compatible with older 896537 harnesses?
Yes. It extends any 896537-series main engine/boat harness cleanly.

Q5: Is installation simple?
Yes. It plugs inline and routes like any standard SmartCraft cable.