Mercury – Dual Engine Zero Effort 8-Pin Trim All Harness | Rocker Switch Breakout | 84-8M0047784

Overview
This harness breaks the 8-pin Trim All connector on newer Zero Effort controls into individual bullet leads for dual-engine trim rockers. It’s the clean way to run separate dash-mounted trim switches while still keeping a Trim All function in the mix. If your boat uses newer Zero Effort controls but your dash relies on individual rocker switches, this harness ties the two together without any custom wiring or splicing.

Key Features
    • 8-Pin to Bullet Breakout – Splits the Trim All connector into individual bullet leads.
    • Dual-Engine Layout – Built for two-engine Zero Effort setups.
    • Supports Dash Rockers + Trim All – Works with separate rockers along with a Trim All input.
    • OEM Connectors – Factory ends that snap in tight and stay put.
    • No Splicing Needed – Clean, direct link from control to dash switches.

Engine & Boat Compatibility
    • Zero Effort controls (newer 8-pin Trim All style)
    • Dual-engine DTS
    • Dash-mounted rocker trim switches

Performance & Practical Benefits
With this breakout harness, each rocker gets its own clean trim lead, which keeps trim response steady and predictable. It also means the wiring behind the dash stays organized instead of patched together with adapters or homemade jumpers. Day-to-day use feels more natural, especially when you’re making small trim bumps to balance the boat or running in changing conditions.

Why Buy OEM
OEM harnessing follows Mercury’s wiring logic exactly, so the trim signals land where they’re supposed to. The connectors hold tight under vibration and spray, helping you avoid loose-fit gremlins and inconsistent trim behavior.

FAQ
Q1: When do I need this harness?
A: When you have a dual-engine Zero Effort control with the newer 8-pin Trim All connector and want to use individual dash rocker switches.

Q2: Does the harness need calibration?
A: Nope—plug it in and the trim circuit works normally.

Q3: Is it fine for saltwater boats?
A: Yes. Rinse occasionally and keep the connectors clean.

Q4: Any install tips?
A: Route the bullet leads with a little slack and keep them off sharp edges.

Q5: What are early signs something’s off?
A: One engine trimming slower than the other, intermittent rocker response, or a loose connector feel.