Mercury – Fuel Tank Harness | 120-Inch Tank Sender Lead | 84-898289T75

Overview

Big offshore engines and high-horsepower sterndrives need reliable fuel-level information, and that starts with a clean connection from the tank sender to the engine’s harness. The Mercury 84-898289T75 Fuel Tank Harness provides a 120-inch run designed to link fuel tank senders to engines such as the 350 Verado SCI and the 565–1650 series sterndrives. It also works across the full lineup, including the 450R and even the V12 platforms. It’s a long, flexible harness built to keep fuel-level data accurate, no matter how large the boat or how long the rigging path.

Key Features

• 120-Inch Harness – Provides ten feet of length for long rigging runs between tank senders and engine harnesses.
• Fuel Sender Connection – Carries clean, stable fuel-level data from the tank to the engine.
• Wide Engine Coverage – Built for the 350 Verado SCI and 565–1650 sterndrive models.
• Full-Line Compatibility – Also works with 450R, V12, and other engines requiring a tank-sender link.
• OEM Connector Fit – Factory Mercury ends provide a snug, reliable connection.
• Rigging-Friendly Layout – Flexible enough to route through tight rigging channels or long chases.

Compatibility

• 350 Verado SCI
• 565–1650 Mercury Racing sterndrives
• 450R outboards
• V12 outboards
• Fuel tank senders requiring a dedicated harness connection

Performance & Practical Benefits

This harness gives you the length needed to run a proper fuel-sender connection on large center consoles, performance hulls, and deep-rigged boats. The signal stays clean across the entire 120-inch run, helping the engine and helm display show accurate, steady fuel-level information. It prevents the strain and voltage drop that can happen with makeshift extensions, and it keeps the wiring layout simple and professional.

Why Buy OEM

Fuel-level data needs a stable, noise-free pathway to avoid erratic gauge readings. Mercury’s OEM harness uses the correct wire gauge, shielding, and connector design to keep the signal clean. Aftermarket substitutes often struggle with vibration, loose connections, or corrosion. The factory harness stays secure and dependable, even on high-horsepower rigs that see heavy use.

FAQ

Q1: When should I use this 120-inch fuel tank harness?
When the tank sender is farther from the engine rigging point than standard harnesses can reach.

Q2: Does it work with modern high-power outboards?
Yes—it's used on everything from the 450R to the V12 models.

Q3: Is it only for outboards?
No. It’s also designed for high-performance sterndrives, including the 565–1650 engines.

Q4: Does the harness affect fuel-level accuracy?
It helps maintain stable readings by providing a clean, OEM-spec signal path.

Q5: Is installation straightforward?
Yes. It plugs into the tank sender lead and the engine harness using factory connectors.