Mercury – Remote Trim Harness | Triple / Quad Engine Trim Routing | 84-8M0175106

Overview
This harness gives triple- and quad-engine boats a clean way to run remote trim controls without getting tangled in extra wiring. It keeps the trim circuit straightforward, which makes the helm feel calmer when you’re making small bow changes or settling the boat into a groove. The layout stays tidy, so you’re not wrestling with a bundle of wires every time you open the rigging bay. It’s a simple upgrade that helps the whole system feel more organized.

Key Features
    • Remote Trim Pathway – Provides the wiring run for multi-engine remote trim control.
    • Triple / Quad Use – Designed for three- and four-engine layouts.
    • Organized Routing – Helps keep trim wiring clean and traceable.
    • OEM Connectors – Factory-fit terminals for a solid, dependable connection.
    • Consistent Signal Flow – Helps maintain steady trim response across all engines.

Engine & Boat Compatibility
    • Triple engine
    • Quad engine
    • Digital trim pathways

Performance & Practical Benefits
With a proper harness in place, trim adjustments feel more even from engine to engine, especially on bigger offshore hulls. The wiring is easier to follow later, which saves time when you’re tracking down small issues or adding accessories. Keeping the trim path tidy also reduces strain that can cause loose connections over time. The end result is smoother control and a more relaxed, predictable helm.

Why Buy OEM
OEM harnesses stay tight through vibration and long hours on the water. The connectors match Mercury’s layout, so the trim system behaves the way it’s supposed to. It’s dependable wiring you can trust for the long haul.

FAQ
Q1: How do I know I need this harness?
A: If your boat runs three or four engines and needs a dedicated trim circuit from the helm, this harness is the clean way to do it.

Q2: Does the harness need calibration?
A: No—once it’s plugged in, it simply carries the trim signal.

Q3: How does it handle saltwater?
A: A quick rinse and an occasional connector check keep it in good shape.

Q4: Any installation tips?
A: Route it with gentle bends and leave yourself room around service areas.

Q5: What are signs the harness might be wearing out?
A: Sluggish or uneven trim response, intermittent switch action, or corrosion at the connectors.