Mercury – Rig Center Adapter Harness | 12-Pin EHPS Connection | 84-8M0181295

Overview
This harness gives the rig center a clean way to connect to the 12-pin EHPS system used on 450R and 500R hydraulic steering setups. It keeps the wiring path straightforward, which really helps when space gets tight around the rigging bay. Everything plugs in where it should, so you’re not fighting loose ends or guessing which connector belongs where. It’s a simple, steady piece that keeps the steering system talking the way it should.

Key Features
    • 12-Pin Adapter Harness – Links the rig center to the EHPS interface.
    • 450R / 500R Use – Built for engines using hydraulic EHPS systems.
    • OEM Connectors – Factory-style plugs for a tight, reliable fit.
    • Clean Routing – Helps keep the steering circuit organized.
    • Stable Communication Path – Supports steady EHPS operation.

Engine & Boat Compatibility
    • 450R
    • 500R
    • EHPS hydraulic steering
    • Rig center systems

Performance & Practical Benefits
A proper adapter keeps the steering system calmer and more predictable, especially when you’re making steady adjustments at speed. The wiring sits where it belongs instead of crowding other harnesses, which cuts down on stress points and future wear. It also makes service work a lot easier because the path from the rig center to the EHPS system is clear and easy to follow. The whole setup ends up feeling cleaner and more deliberate.

Why Buy OEM
OEM harnesses hold tight, use the right terminals, and keep communication steady between steering components and the rig center. They’re built to handle heat, vibration, and saltwater without falling apart or acting flaky. It’s a part you install once and rely on for years.

FAQ
Q1: How do I know I need this harness?
A: If you’re running a 450R or 500R with an EHPS steering system and need a clean 12-pin connection to the rig center, this is the one.

Q2: Does it require calibration?
A: No—once connected, it simply carries the signals.

Q3: How does it hold up in saltwater?
A: With normal rinsing and occasional connector checks, it holds up well.

Q4: Any installation tips?
A: Route it with gentle bends and leave a little slack so nothing’s pulled tight.

Q5: What are signs the harness may be wearing out?
A: Intermittent steering signals, loose connectors, or jacket wear along the run.