Mercury – Side Mount Remote Control, 14-Pin, Port Side | Outboard Control with Trim | 8M0178539

Overview

This control is made for boats where running the throttle with your left hand just feels right. Happens more than people think. It mounts on the port side, trim is built right into the handle, and once it’s installed it feels natural pretty quickly. The fifteen-foot harness usually gives you enough slack to route things cleanly without fighting it. Plug it in, set your cables, and you’re off—no adapter harness to mess with.

Key Features

 • Port Side, Left-Hand Layout – Built to be mounted on the port side and run comfortably with your left hand.
 • Handle-Mounted Trim Switch – Lets you bump trim without moving your hand around.
 • 4000 Series Stackable Design – Can be stacked with other 4000 Series side mount controls if needed.
 • 14-Pin Deutsch Harness – Fifteen feet of harness length usually covers most console layouts.
 • Direct Plug-In Connection – No adapter harness required on supported engines.

Engine & Boat Compatibility

 • Mercury outboard engines, 2006 and newer
 • Non-DTS outboards
 • Twenty-five to three hundred horsepower range
 • Mechanical control systems
 • 4000 Series side mount controls
 • GEN I throttle and shift cables

Performance & Practical Benefits

Once you’ve got some time on it, this control just feels normal. Trim is easy to work while you’re bringing the boat onto plane or backing down in chop. The handle movement stays smooth at idle, which helps when you’re docking or creeping through tight areas. After the cables are dialed in, it’s not something you think about—and that’s usually the goal.

Why Buy OEM

OEM Mercury controls are built around Mercury cable routing and wiring layouts, not guesswork. Everything lines up, plugs in clean, and stays that way. Trim response stays consistent and you’re not chasing small problems later. For something you touch every time you run the boat, OEM usually makes sense.

FAQ

Q1: How do I know this is the correct left-hand control?
A: This model is designed specifically for port-side mounting and left-hand operation.

Q2: Do I need an adapter harness for installation?
A: No, it plugs directly into compatible engines using the 14-pin connector.

Q3: What throttle and shift cables are required?
A: GEN I throttle and shift cables must be used.

Q4: Can this be stacked with another side mount control?
A: Yes, it’s part of Mercury’s 4000 Series stackable side mount system.

Q5: What are early signs this control needs attention?
A: Stiff shifting, rough handle movement, or trim that doesn’t respond smoothly.