Mercury – Tab Extension Harness Assembly | 30-Foot Trim Tab Lead | 84-898059T30

Overview

Extra-long boats and complex rigging paths often need far more reach than the factory trim tab harness provides. The Mercury 84-898059T30 Tab Extension Harness Assembly adds a full thirty feet of length, giving you the room to run the wiring cleanly from helm to transom—no stretching, no tight bends, and no awkward detours. It keeps the system responsive and gives the rig a cleaner, more professional finish.

Key Features

• 30-Foot Extension – Maximum-length extension for long-distance trim tab wiring.
• OEM Tab Harness – Built to extend Mercury trim tab circuits with proper shielding and fit.
• Rigging Flexibility – Ideal for large center consoles, dual-station boats, and wide-beam layouts.
• Factory Connector Ends – Ensures a clean, reliable plug-in connection with no modification.
• Stable Electrical Path – Maintains smooth, predictable tab response across the added length.
• Marine-Grade Durability – Designed to withstand vibration, moisture, and long-term exposure.

Compatibility

• Mercury trim tab systems
• Long helm-to-transom wiring runs
• Boats requiring a 30-foot tab harness extension

Performance & Practical Benefits

On bigger boats, the extra length keeps the wiring relaxed and prevents the tension that can cause premature wear. The harness routes cleanly through long chases and under-deck channels, and the tabs respond just as they would with the factory lead. It’s a straightforward way to keep the system tidy and ensure the tabs behave reliably, even on extended rigging runs.

Why Buy OEM

Long harness runs demand proper shielding and connector integrity. Mercury’s OEM extension maintains the correct electrical spec, eliminating the signal issues and loose connections often seen with aftermarket cables. The factory-grade construction holds up in harsh marine conditions and keeps the tab system communicating clearly.

FAQ

Q1: When is a 30-foot extension necessary?
When the standard harness cannot reach the helm or control module due to long or complex boat layouts.

Q2: Does the added length affect tab performance?
No. The OEM cable maintains clean signal flow across the full 30 feet.

Q3: Is installation straightforward?
Yes. It plugs inline with the original harness and routes like any standard tab cable.

Q4: Is it suitable for saltwater boats?
Yes. The jacket and connectors are designed for long-term marine exposure.

Q5: Will more length help reduce strain on the main harness?
Absolutely—additional reach allows smoother routing and prevents overstressing the original cable.