Mercury – Troll Control Y Harness | 14-Pin Mechanical CAN P Splitter | 84-8M0042976

Overview

Troll Control works best when the connection to the engine is clean and direct. The Mercury 84-8M0042976 Troll Control Y Harness gives mechanical-control boats a simple way to plug the Troll Control kit straight into the main engine harness—no J-box required. It keeps the setup tidy, avoids unnecessary components, and gives the control module a solid CAN P link for smooth low-speed operation.

Key Features

• Direct Y-Split Connection – Links the main engine harness and Troll Control kit without using a J-box.
• 14-Pin Mechanical Design – Built specifically for mechanical 14-pin CAN P breakout harnesses.
• Troll Control Compatible – Intended for use with Troll Control Kit 879365K08 (879365A08).
• CAN P Only – Not compatible with Next Gen DTS or any CAN H systems.
• Clean Rigging Solution – Reduces clutter by removing the need for additional junction hardware.
• OEM Connector Fit – Uses factory SmartCraft connectors for a secure, reliable install.

Compatibility

• Mechanical 14-pin CAN P breakout harnesses
• Troll Control Kit 879365K08
• Troll Control Kit 879365A08
• Mechanical SmartCraft-compatible engines

Performance & Practical Benefits

This Y harness keeps the Troll Control setup simple and stable by giving it a direct link to the engine’s CAN P line. The connection stays clean, which helps low-speed control respond more smoothly when dialing in fine trolling adjustments. With no J-box required, the rigging is easier to route, easier to troubleshoot, and less prone to unnecessary connection points.

Why Buy OEM

Mercury’s OEM wiring follows the exact SmartCraft communication standards, ensuring the Troll Control module receives the proper CAN P signals without interference. Off-brand splitters often introduce noise or unstable connections, which can affect slow-speed behavior. The factory Y harness fits correctly, stays secure, and holds up in high-vibration marine environments.

FAQ

Q1: When do I need this Y harness?
When installing Troll Control on a mechanical-control engine that uses a 14-pin CAN P breakout harness and you want to avoid adding a J-box.

Q2: Can this be used on Next Gen DTS engines?
No. It is designed only for CAN P mechanical systems, not CAN H or DTS networks.

Q3: Does it change how Troll Control functions?
No. It only provides the proper connection point—the Troll Control module operates normally.

Q4: Is installation difficult?
It’s straightforward: plug each end into the matching connectors and route the harness cleanly.

Q5: Will this hold up in saltwater use?
Yes. The OEM connectors and cable jacket are built for long-term marine exposure.