Mercury – Bow Trim Harness | Bow-Mounted Trim Wiring | 84-8M0169506

Overview
This bow trim harness gives you a clean way to run trim control from a bow-mounted button back to the engine’s cowl trim switch. It’s the wiring path that lets you trim the engine without reaching the helm—handy when you’re working up front or loading the boat. The harness keeps things tidy and avoids the hassle of splicing or improvising your own connections. It works on all 2004-and-newer DTS engines.

Key Features
    • Bow Trim Harness – Connects a bow-mounted trim button to the engine’s cowl trim switch.
    • Direct Wiring Path – Runs cleanly from the bow switch to the engine.
    • 2004+ DTS Use – Built for all Digital Throttle and Shift engines from 2004 forward.
    • OEM Connectors – Factory ends for a solid, no-guesswork fit.
    • Clean Routing – Helps keep trim wiring organized and easy to trace.

Engine & Boat Compatibility
    • Digital Throttle and Shift (2004+)
    • Single engine
    • Bow-mounted trim switch circuits

Performance & Practical Benefits
A proper bow trim harness keeps the wiring from getting cramped or patched together, so the trim response feels steadier. It’s especially useful when you’re up at the bow adjusting the trailer, dealing with anchors, or stepping off at the dock. The wire run is clean and predictable, which also makes troubleshooting easier down the road.

Why Buy OEM
OEM harnessing stays tight, resists vibration, and handles spray far better than off-brand wiring. The connectors fit exactly the way Mercury designed them to, which means fewer trim hiccups and more reliable operation.

FAQ
Q1: How do I know I need this harness?
A: If you’re adding or replacing a bow-mounted trim button on a DTS engine (2004+), this is the harness that ties it to the cowl switch.

Q2: Do I need to calibrate anything after installation?
A: No—once it’s plugged in, trim works normally.

Q3: How does it hold up in saltwater?
A: Very well. Just rinse now and then and check the connector.

Q4: Any installation tips?
A: Route it along smooth paths and avoid tight bends so the jacket doesn’t rub.

Q5: What are early signs it may need attention?
A: Slow or inconsistent trim response, intermittent operation, or visible wear along the harness.