Mercury – Lower Dual Helm Harness Quad Engine | Next Gen DTS Helm Harness | 84-8M0157220

Overview
This harness handles the lower helm on a quad-engine, dual-station DTS setup. It gives the lower station a clean, direct path into the system so it isn’t sharing tight wiring space with the upper helm. Once the upper harness and the helm-to-helm extensions are added, both stations stay in sync without the controls feeling jittery or delayed. It’s a simple piece, but it keeps a big multi-engine layout from feeling cluttered or stressed.

Key Features
    • Next Gen DTS Lower Harness – Built for quad-engine, dual-helm configurations.
    • Lower-Station Pathway – Moves throttle, shift, and system data from the lower helm.
    • OEM Connectors – Factory plugs that snap in securely.
    • Cleaner Routing – Helps avoid tight bends and wiring overload below deck.
    • Dual-Helm Integration – Works with the upper harness and helm-to-helm extensions.

Engine & Boat Compatibility
    • Next Gen Digital Throttle and Shift
    • Quad engine
    • Dual-helm stations

Performance & Practical Benefits
A dedicated lower-helm harness helps the controls feel even from one station to the other. You avoid laggy inputs or uneven shifts that show up when wiring is squeezed into a tight path. It also makes service work less frustrating because the lower-helm signal path is easy to follow. Everything feels calmer and more predictable, especially when docking or swapping helms.

Why Buy OEM
OEM wiring holds up to heat, vibration, and saltwater, and the connectors fit exactly the way Mercury designed. You’re less likely to deal with random glitches or loose connections. It’s the kind of rigging that stays reliable season after season.

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

Q2: What else is needed for the full install?
A: You’ll need the upper helm harness plus the correct helm-to-helm extension harnesses.

Q3: Any calibration required?
A: No—once it’s plugged in, DTS handles the checks automatically.

Q4: Any install tips?
A: Give it a smooth path with a little slack so the wiring isn’t strained.

Q5: What are early signs it may be wearing out?
A: Hesitant shifts, uneven throttle response, or spots where the jacket is rubbing.