Mercury – Quicksilver 828507Q4 Alternator Belt | Mercury 2.5L V6 OptiMax Outboards (Non-Pro Models) | 828507Q4

Overview

A good alternator belt keeps your outboard’s electrical system steady and dependable. The Quicksilver 828507Q4 Alternator Belt is the same factory-installed part Mercury uses on 2.5L V6 OptiMax outboards (non-Pro models), serial number 1B227000 and above.

If your old belt is worn, squealing, or slipping, this OEM replacement restores proper alternator performance and power delivery to your boat’s battery and accessories. It’s made for real marine use — flexible, quiet, and built to take years of vibration, load, and heat without stretching or cracking.

Key Features

• Purpose: Transfers engine power to the alternator, ensuring your battery stays charged and your electronics powered.
• Material: Constructed from marine-grade reinforced rubber designed to resist heat, oil, and saltwater exposure.
• Performance: Delivers consistent grip and tension under heavy RPMs; reduces slippage and squealing for smooth operation.
• Design: Matches the original Mercury factory belt, molded with durable ribbing for quiet, efficient rotation.
• Ease of Use / Install: Direct-fit replacement that installs easily with standard tools — no modification required.

Engine & Boat Compatibility

• Mercury 2.5L V6 OptiMax outboards (non-Pro models, serial 1B227000 & up)
• Common on bay boats, center consoles, and performance fishing rigs

Performance & Real-World Benefits

The 828507Q4 alternator belt keeps your alternator spinning smoothly so your battery stays charged and your systems stay online — from GPS to livewells. It’s designed for the marine environment, where constant heat, moisture, and vibration can destroy lesser belts.

Replacing an old belt with this OEM version prevents squeaks, slippage, and potential alternator damage. It’s one of those small maintenance jobs that keeps your motor reliable and your time on the water uninterrupted.

Why Choose OEM

Mercury’s belts are tested under real marine loads and built to the brand’s torque, tension, and longevity standards. Aftermarket belts might look close but often stretch, crack, or slip early.

A genuine Quicksilver alternator belt ensures perfect pulley fit, proper grip, and years of dependable service — the same quality Mercury installs at the factory.

FAQ

Q1: What engines fit the Quicksilver 828507Q4 alternator belt?
A: It fits 2.5L V6 Mercury OptiMax outboards (non-Pro models), serial 1B227000 and above.

Q2: What’s it made from?
A: Marine-grade reinforced rubber designed to handle high tension, heat, and salt exposure.

Q3: Is it hard to install?
A: No. It’s a simple swap using basic hand tools and your service manual for tensioning.

Q4: How do I know it’s time to replace the belt?
A: Look for fraying, cracking, squealing, or visible glazing — all signs the belt is slipping.

Q5: Why use OEM instead of an aftermarket belt?
A: OEM belts maintain the correct grip, fit, and tension for Mercury alternators, preventing early wear and performance loss.