Mercury – Upper Dual Helm Harness Triple Engine | Next Gen DTS Helm Harness | 84-8M0157218

Overview
This harness handles the upper helm on a triple-engine, dual-station DTS setup. It gives the top helm its own clean path into the system, instead of sharing cramped space with the lower station. When it’s paired with the lower harness and the helm-to-helm extensions, both helms stay in sync and the controls feel steady. It’s a simple piece that helps a busy multi-engine layout stay organized instead of chaotic.

Key Features
• Next Gen DTS Upper Harness – Made for triple-engine, dual-helm configurations.
• Upper-Station Pathway – Moves throttle, shift, and system data from the top helm.
• OEM Connectors – Factory plugs that snap in tight and stay locked.
• Cleaner Routing – Helps reduce clutter and tight bends behind the upper dash.
• Dual-Helm Integration – Works with the matching lower harness and helm-to-helm extensions.

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

Performance & Practical Benefits
With this harness in place, the upper station reacts more naturally because it isn’t relying on a cramped or shared wiring run. Shifts and throttle bumps feel more in step with the lower helm, which matters when switching stations or lining up tight maneuvers. It also makes service work a lot less frustrating since the upper-station path is easy to trace. Everything feels cleaner and more predictable.

Why Buy OEM
OEM harnessing fits the DTS system the way Mercury designed it. The plugs stay tight, the wiring holds up to vibration and salt spray, and you avoid the random glitches that show up with off-brand pieces. It’s dependable rigging that you won’t need to babysit.

FAQ
Q1: How do I know this is the right harness?
A: If your triple-engine DTS setup has two helms, this is the harness for the upper station.

Q2: What else do I need for a complete install?
A: You’ll need the lower helm harness and the proper helm-to-helm extension harnesses.

Q3: Any calibration required?
A: No—DTS runs its own checks once everything’s connected.

Q4: Any installation tips?
A: Keep the routing smooth with gentle bends so the harness isn’t stressed.

Q5: What are early signs it may need attention?
A: Sluggish shifts, uneven throttle feel, or spots where the jacket is rubbing through.