Mercury – Side Mount Control Harness, No Trim, 20 ft | 84-8M0143200

The Mercury Side Mount Control Harness (No Trim) is designed for mechanical side-mount control systems on engines that do not use power trim. This harness provides a clean electrical connection between the control box and the engine while keeping the wiring setup simple and uncluttered. Its 20-foot length supports easier routing on wider hulls and center-console layouts, making it well-suited for new installations or replacing older, brittle wiring.

Maintaining control wiring in good condition helps support steady electrical signals and dependable control response. Replacing worn or damaged harnesses can help reduce intermittent electrical issues caused by corrosion, loose connectors, or improper routing, while also minimizing long-term strain on electrical connections.

Key Features

• Non-Trim Harness Design – Intended for side-mount controls on engines without power trim
• 20-Foot Harness Length – Supports flexible routing on larger boat layouts
• Factory-Style Electrical Connectors – Maintains secure connections without cutting or splicing
• Mechanical Control Compatible – Designed for cable-driven throttle and shift systems
  
  

Engine & System Compatibility

• Mercury outboards
• Mechanical (cable-driven) control systems
• Non-trim engine applications
  
  

Important Notes

• Wiring and connector requirements can vary by engine model and existing rigging
• Confirm control style, connector compatibility, and engine configuration before ordering
• Proper routing, strain relief, and secure connections are required for reliable control operation
  
  

FAQs

1) What is this harness used for?
It connects a mechanical side-mount control to a Mercury outboard that does not use power trim.

2) Does this harness include trim wiring?
No. This harness is intended for non-trim applications only.

3) Is cutting or splicing required for installation?
No. The harness uses factory-style connectors for direct connection.

4) How long is this control harness?
This harness measures 20 feet, making it suitable for larger or wider boat layouts.

5) Why use an OEM Mercury control harness?
OEM harnesses are built to Mercury wiring standards and connector tolerances, helping reduce electrical issues and support long-term reliability.