Mercury – Triple Engine LCM Zero Effort Kit | Legacy Control Module | 84-8M0169308

Overview
This kit lets older triple-engine Zero Effort Controls work smoothly with the newer Digital Throttle and Shift harnessing. It keeps the familiar feel of the original controls while giving the system a cleaner, more predictable digital backbone. With three modules and the harness included, the rigging stays organized instead of turning into a maze behind the helm. It’s a straightforward way to modernize a triple-engine setup without replacing gear that still does its job.

Key Features
    • Triple Legacy Control Modules – Allows older Zero Effort Controls to operate with Next Gen DTS.
    • Triple Engine Design – Built specifically for three-engine configurations.
    • Included Harness – Provides the needed wiring path for all three modules.
    • Digital System Integration – Connects legacy throttle hardware to modern DTS rigging.
    • Additional Harness Required – Key switch harness must be purchased separately.

Engine & Boat Compatibility
    • Zero Effort Controls
    • Next Gen Digital Throttle and Shift
    • Triple engine layouts

Performance & Practical Benefits
Once everything’s tied in, the three engines tend to feel more balanced and consistent when shifting or easing in and out of tight spots. The wiring follows a cleaner and more predictable path, which makes troubleshooting much easier down the road. Vibration issues drop off because the system isn’t relying on old mixed-match connections anymore. The helm ends up feeling steadier and less chaotic on long runs.

Why Buy OEM
OEM components give you steady communication between engines and controls, which matters a lot in triple-engine setups. Everything lines up with Mercury’s intended layout, reducing glitchy behavior and loose connections. The parts hold up well to heat, vibration, and long seasons on the water.

FAQ
Q1: How do I know this is the right kit?
A: If you’re keeping triple Zero Effort Controls but shifting to Next Gen DTS wiring, this is the module setup you need.

Q2: Does this require calibration afterward?
A: No—DTS handles its own setup once the modules are installed.

Q3: How does it handle saltwater use?
A: With normal rinsing and harness checks, it holds up well in saltwater environments.

Q4: Anything to know before installing?
A: Make sure you have the key switch harness—it's required to complete the setup.

Q5: What happens when a module starts acting up?
A: You may see uneven throttle response between engines or intermittent digital behavior at the helm.