Mercury 98-8M0173880 Triple ERC 10-Foot Extension Harness

Mercury – Next-Gen ERC Extension Harness Kit (Triple) | 10-Foot Extension | 98-8M0173880

Overview
This ten-foot extension gives a triple-engine Next-Gen ERC setup the extra reach it often needs when the stock harness won’t quite make the run. Triple-engine rigs usually have longer or more complicated routing paths, and this extension keeps you from forcing the wiring into tight corners. It lets the harness follow a smoother, more natural path so the controls feel steady and predictable. It’s a simple add-on that makes a busy layout a lot easier to work around.

Key Features
• Ten-Foot Extension – Adds enough slack for longer or awkward routing paths.
• Triple-Engine ERC Use – Made for three-engine Next-Gen ERC systems.
• OEM Connectors – Factory-matched ends that snap in securely.
• Easier Routing – Helps avoid sharp bends and stretched wiring.
• Stable Signal Flow – Keeps throttle and shift communication smooth.

Engine & Boat Compatibility
• Next-Gen ERC
• Triple engine
• Digital rigging layouts

Performance & Practical Benefits
With the extra length, the harness can sit in a relaxed path instead of getting jammed through tight spaces. You’ll usually feel a smoother response at the controls because the wiring isn’t kinked or under tension. It also makes service work easier—everything is easier to follow and less cramped. On a triple-engine boat, even a little breathing room makes the whole setup feel calmer.

Why Buy OEM
OEM extensions handle vibration, heat, and salt spray without loosening up or causing strange electrical behavior. The connectors match Mercury’s design exactly, which helps avoid intermittent signals or loose-fit issues. It’s wiring you can trust for the long haul.

FAQ
Q1: How do I know I need this extension?
A: If the ERC lead for your triple-engine setup is just a bit too short or forces sharp bends, this ten-foot extension usually fixes it.

Q2: Do I need to configure anything after installing it?
A: Nope—just plug it in.

Q3: How does it handle saltwater?
A: Fine. A simple rinse now and then keeps things in good shape.

Q4: Any installation tips?
A: Route it with gentle curves and leave a little slack to avoid stressing the harness.

Q5: What are signs the harness may be wearing out?
A: Hesitant controls, intermittent signals, or areas where the jacket is rubbing thin.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.