Mercury – Quicksilver Serpentine Belt | 2,240mm | For MerCruiser Sterndrive & Inboard Engines | 807755Q04

Overview

A worn or cracked belt can mean the difference between a smooth day on the water and an unexpected breakdown. The Mercury Marine 807755Q04 Quicksilver Serpentine Belt is a 2,240mm OEM replacement, designed to keep your MerCruiser sterndrive or inboard engine performing just like it did the day it left the factory. This belt drives essential systems like your alternator, power steering pump, and water pump — maintaining proper tension and alignment for efficient power transfer. Built to last in the harsh marine environment, it’s the exact same belt Mercury installs on new engines, ensuring consistent performance and quiet operation trip after trip.

Key Features

• Purpose: Replaces worn or stretched serpentine belts for reliable accessory drive operation.
• Dimensions: 2,240mm long, matching the factory-installed belt on MerCruiser engines.
• Durability: Made from high-strength, marine-grade materials that resist cracking, heat, and corrosion.
• Fitment: Designed to meet or exceed OEM specifications for exact fit and function.
• Ease of Installation: Simple to replace with standard tools; no modifications required.

Engine & Boat Compatibility

• Fits select MerCruiser sterndrive and inboard engines (refer to your owner’s manual for exact applications).

Performance & Real-World Benefits

The 807755Q04 serpentine belt delivers smooth, quiet power transfer to your engine’s accessory systems. Over time, belts can stretch, slip, or crack due to constant exposure to heat and moisture — symptoms that lead to power loss or alternator and pump inefficiency. Replacing it with this OEM belt restores full system performance and eliminates squealing, slippage, or inconsistent tension.

Because it’s made to Mercury’s exact specifications, you can count on a perfect fit and proper alignment every time. The reinforced construction helps prevent premature wear, while the ribbed design ensures maximum grip and minimal vibration. Whether you’re idling at the dock or running wide open, this belt keeps your systems turning smoothly and efficiently.

Why Choose Mercury OEM

The Quicksilver 807755Q04 is a genuine Mercury Marine part, engineered for precision and reliability. Aftermarket belts may appear similar but can vary slightly in length, flexibility, or material quality — leading to slippage or early failure.

Mercury OEM belts are tested under real marine operating conditions for temperature stability, stretch resistance, and long-term performance. It’s the same belt trusted by Mercury factory technicians, so you can install it once and count on it to last.

FAQ

Q1: What engines does this belt fit?
It’s made for select MerCruiser sterndrive and inboard engines. Check your owner’s manual for specific model compatibility.

Q2: What is the belt length?
The belt measures 2,240mm long.

Q3: When should I replace my serpentine belt?
Inspect it annually and replace it if you see cracking, fraying, or glazing on the ribs.

Q4: Is it easy to install?
Yes — installation is straightforward and requires only basic hand tools.

Q5: Why use an OEM belt?
Because Mercury OEM belts are designed for exact fit and tension, delivering quiet operation and long-lasting reliability under real marine conditions.