Mercury – Upper Dual Helm Harness Single Engine | Next Gen DTS Helm Harness | 84-8M0159749

Overview
This harness handles the upper-helm side of a single-engine, dual-helm Next Gen DTS setup. It gives the upper station a clean path into the system so the controls feel steady and responsive. Paired with the lower harness and the helm-to-helm extensions, it keeps the whole layout organized instead of turning into a knot of wiring. It’s a simple piece, but it makes running two helms feel a lot more natural.

Key Features
• Next Gen DTS Upper Harness – Built for the upper station on dual-helm single-engine rigs.
• Upper-Station Routing – Carries throttle, shift, and system data from the top helm.
• OEM Connectors – Factory plugs that lock in securely.
• Clean Harness Layout – Helps avoid tight bends and clutter between stations.
• Dual-Helm Ready – Designed to work with the matching lower harness and helm-to-helm extensions.

Engine & Boat Compatibility
• Next Gen Digital Throttle and Shift
• Single engine
• Dual-helm layouts

Performance & Practical Benefits
The upper station feels more consistent because it isn’t sharing a cramped or improvised wiring path. Shifts and throttle inputs come through smoother, especially when switching between helms. The wiring is easier to trace later, which helps a lot when you’re doing routine service or adding gear. It keeps the whole dual-helm setup feeling more put-together and less chaotic.

Why Buy OEM
OEM harnessing fits the way Mercury designed the system, which means fewer odd glitches or loose-feeling responses. The materials handle vibration, heat, and saltwater far better than generic wiring. It’s solid, dependable rigging you can trust.

FAQ
Q1: How do I know I need this harness?
A: If your single-engine boat has two helms and uses Next Gen DTS, this is the upper-station harness.

Q2: What else do I need for the full setup?
A: You’ll need the lower harness plus the helm-to-helm extension harnesses.

Q3: Does anything need calibration?
A: No—DTS handles its own checks once everything is plugged in.

Q4: Any install tips?
A: Route it with gentle bends and leave a little slack so the harness isn’t strained.

Q5: What are early signs of wear?
A: Hesitant shifts, inconsistent throttle feel, or visible rubbing on the harness jacket.

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.