Mercury – Quicksilver 828507Q11 Alternator Belt | Mercury 150–300HP EFI 2-Stroke Outboards | 828507Q11

Overview

Your alternator belt does more than you might think — it keeps your battery charged, your electronics running, and your trip worry-free. The Quicksilver 828507Q11 Alternator Belt is the factory-fit replacement for Mercury 150–300HP EFI 2-stroke outboards, built tough to handle real marine abuse.

This belt is made from heavy-duty, fiber-reinforced rubber that won’t slip or stretch under load. It’s quiet, durable, and designed to hold tension, so your alternator keeps spinning steady no matter how hard you run your boat.

Key Features

• Purpose: Drives the alternator to keep your outboard’s charging system and electronics powered reliably.
• Material: Constructed from marine-grade reinforced rubber with woven fibers to resist stretching and cracking.
• Performance: Handles high RPMs, heat, and salt exposure while maintaining smooth, consistent tension.
• Design: Precision-shaped ribs help the belt grip tight and run quietly, reducing vibration and slippage.
• Ease of Use / Install: Direct OEM replacement that fits right onto your Mercury pulleys — easy swap with basic tools.

Engine & Boat Compatibility

• Mercury EFI 2-stroke outboards: 150HP, 175HP, 200HP, 225HP, 250HP, and 300HP models
• Common on offshore boats, bay boats, and high-performance rigs

Performance & Real-World Benefits

The 828507Q11 alternator belt keeps your charging system working like it should — steady voltage, full battery, and no squeal when you throttle up. It’s made to live in the heat and humidity that destroy cheaper belts.

If your old belt’s glazed, noisy, or slipping, replacing it with this OEM one is an easy way to avoid downtime. You’ll hear the difference right away — smoother, quieter operation and the confidence that your alternator is doing its job.

Why Choose OEM

Mercury’s belts are made for marine use from the start, not repurposed from automotive stock. They’re tested for long life, salt resistance, and perfect pulley fit. Aftermarket belts often stretch early or lose grip under heavy load.

A genuine Quicksilver belt fits right, lasts longer, and delivers the steady charge your outboard depends on. One good belt can mean the difference between finishing your day or calling for a tow.

FAQ

Q1: What engines fit this alternator belt?
A: It’s made for Mercury 150–300HP EFI 2-stroke outboards.

Q2: What’s it made of?
A: High-strength marine rubber reinforced with woven fibers for durability and flexibility.

Q3: Is it easy to install?
A: Yes. Loosen the tensioner, slip the old belt off, and install the new one — simple hand tools are all you need.

Q4: Can it handle saltwater use?
A: Absolutely. It’s built for marine heat and corrosion, lasting far longer than generic belts.

Q5: Why OEM instead of aftermarket?
A: OEM belts grip better, stay quiet, and hold tension longer — they’re built for your motor, not just close to it.