Mercury – Zero Effort R.C. Extension Harness | 3-Foot Control Extension | 84-8M0169399

Overview
This three-foot extension just gives your Zero Effort control wiring a little more room to run. If the original lead is coming up short or the rigging path turns tighter than you expected, this piece makes life easier. It keeps you from forcing the harness into a bend it doesn’t like or stretching it across the bay. It’s a simple fix that makes the whole control line feel more natural.

Key Features
    • 3-Foot Extension – Adds a bit of extra reach where the stock line falls short.
    • Zero Effort Control Use – Made for Zero Effort remote control systems.
    • OEM Connectors – Snaps in clean with factory-style ends.
    • Easy Routing – Lets the harness take a smoother, more relaxed path.
    • Consistent Signal Path – Helps the controls respond the way they should.

Engine & Boat Compatibility
    • Zero Effort controls
    • Remote control circuits
    • Digital rigging layouts

Performance & Practical Benefits
A little extra slack goes a long way in tight rigging spaces. You’ll notice the controls feel smoother because the harness isn’t kinked or under tension. And when you’re back there later doing service, the cleaner routing makes it much easier to sort out what’s what. It’s a small upgrade that keeps the whole control run from feeling cramped.

Why Buy OEM
OEM harnesses hold up well in real-world conditions—vibration, heat, and salt spray. The connectors lock in the way Mercury intended, cutting down on random hiccups or loose-feeling controls. It’s one of those parts you put in once and trust.

FAQ
Q1: How do I know I need this extension?
A: If your control lead won’t quite reach or forces a sharp bend, this extension usually fixes it.

Q2: Do I need to adjust or calibrate anything?
A: No—plug it in and it’s ready to go.

Q3: How does it handle saltwater?
A: Rinse now and then and check the connectors—it holds up fine.

Q4: Any installation tips?
A: Keep the path gentle and leave a little room so nothing’s pulled tight.

Q5: What are early signs of wear?
A: Jerky or inconsistent control feel, flickering signals, or cracking insulation.