Mercury – Extension Harness (17 ft) | DTS Analog Gauge Link | 84-8M0150477

Overview
This setup gives you a short 2-foot analog gauge harness paired with a 15-foot 4-pin DTS extension, making it easy to rig the dash and engine separately without stretching wires. It plugs straight into the engine’s 4-pin lead and carries trim, coolant temp, oil pressure, and tach signals cleanly to the dash. On the water, it helps the gauges stay steady and cuts down on the flicker or dropouts that show up with tired or makeshift wiring. It’s a simple, flexible option for DTS boats that need a longer reach.

Key Features
    • 17 ft Total Length – 2 ft gauge lead + 15 ft DTS extension.
    • 4-Pin DTS Connection – Direct plug-in at the engine harness.
    • Analog Gauge Outputs – Trim, coolant temp, oil PSI, tach.
    • Flexible Routing – Ideal for consoles set farther forward.
    • OEM Wire Colors – Matches Mercury’s factory layout for clean rigging.

Engine & Boat Compatibility
    • DTS outboards
    • DTS V6 / V8 outboards
    • DTS MCM 4.5L
    • DTS MCM 6.2L

Performance & Practical Benefits
The combined harness length makes routing easier on bigger boats or layouts where the dash sits a long way from the motor. It creates a clean, uninterrupted path for analog signals, which helps the gauges behave predictably. If your old harness is short, stiff, or causing intermittent readings, this setup smooths things out quickly.

Why Buy OEM
OEM DTS wiring follows Mercury’s exact pinout and uses connectors that stay tight, even when the boat’s bouncing around. Off-brand harnesses can cause odd gauge behavior or loose-fit issues. With OEM, the readings stay steady and troubleshooting becomes a lot easier.

FAQ
1. How do I know this is the right harness?
If you have a DTS engine with analog gauges and need more rigging length, this is the correct extension kit.

2. Does it support digital gauges?
No—this setup feeds analog trim, tach, temp, and oil PSI.

3. Can I shorten the harness?
It’s not recommended—extra length can be coiled neatly.

4. Is installation tough?
No—plug it into the engine, route the extension, and connect the gauges.

5. What symptoms point to a failing old harness?
Jumping needles, dead gauges, slow response, or random dropouts.