Mercury – Quicksilver 828507Q5 Alternator Belt | Mercury 3.0L V6 OptiMax Outboards (Non-Pro Models) | 828507Q5

Overview

When your alternator belt slips or starts squealing, it’s a sign it’s done its time. The Quicksilver 828507Q5 Alternator Belt is the factory replacement for Mercury 3.0L V6 OptiMax outboards (non-Pro models, serial 1B227000 and up). It’s the same belt Mercury installs on new motors—made to handle big power and constant RPM changes without stretching or glazing.

This belt keeps your alternator spinning steady so your battery stays charged, your electronics stay on, and your engine management system gets the juice it needs. It’s tough, flexible, and built for real-world marine conditions.

Key Features

• Purpose: Drives the alternator to maintain a steady charge for your battery and boat electronics.
• Material: Built from reinforced marine-grade rubber with fiber-filled ribs that won’t crack or slip under load.
• Performance: Holds tension through heat, salt, and vibration while staying quiet at high RPM.
• Design: Matches the original Mercury belt exactly for a smooth, balanced fit on factory pulleys.
• Ease of Use / Install: Installs in minutes with hand tools—no mods or adjustments required.

Engine & Boat Compatibility

• Mercury 3.0L V6 OptiMax outboards (non-Pro models, serial 1B227000 & up)
• Common on bay boats, performance fishing rigs, and offshore setups

Performance & Real-World Benefits

The 828507Q5 belt does the simple job of keeping your alternator working right—but it does it better and longer than cheap copies. Its grip stays tight even under heavy throttle, so your alternator doesn’t skip a beat. The fibers in the rubber help it flex without stretching, meaning fewer squeals, less wear, and consistent power delivery.

Swapping in this belt takes less than half an hour and prevents headaches later—no weak charging, no dead batteries, and no guessing whether your belt can handle another run.

Why Choose OEM

Mercury’s belts are designed specifically for their motors, not adapted from automotive parts. They’re tested to handle marine heat, moisture, and long-term torque loads. Aftermarket belts can slip, stretch early, or simply not fit right.

A genuine Quicksilver belt fits perfectly, runs quieter, and lasts longer. It’s one of those small details that keeps your engine feeling solid and dependable.

FAQ

Q1: What engines use this belt?
A: It fits 3.0L V6 Mercury OptiMax outboards (non-Pro models), serial 1B227000 and newer.

Q2: What’s it made of?
A: Reinforced rubber with fiber ribs that add strength and flexibility.

Q3: Can I install it myself?
A: Yes—loosen the tensioner, slip it on, and tighten back up. It’s an easy swap.

Q4: How often should I replace it?
A: Inspect it every season. If it’s cracking, shiny, or squealing, it’s time to replace.

Q5: Why OEM?
A: It’s the same belt Mercury installs new—proper size, perfect tension, proven life.