57-828507Q4 Mercury MerCruiser Serpentine Belt | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Serpentine Belt - Part Number: 57-828507Q4

Genuine Quicksilver/Mercury serpentine belt for selected Mercury / Mariner DFI outboard accessory drive applications. This OEM belt replaces earlier 57-828507-series references and is designed to drive engine accessories correctly under marine operating conditions.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM serpentine belt

• Designed for selected Mercury / Mariner DFI outboard applications

• Direct replacement for earlier 57-828507-series belt references

• Helps maintain correct accessory drive operation

• Marine-grade belt built for heat, load and engine-compartment conditions

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 57-828507Q4 → Supersedes 57-8285074

• 57-8285074 → Supersedes 57-8285072

• 57-8285072 earlier OEM reference

OEM / Related Numbers:

• 57-828507Q4

• 828507Q4

• 57828507Q4

• 57-8285074

• 8285074

• 57-8285072

• 8285072

Aftermarket / Verified Equivalents:

• Sierra: 18-18100

🚤 Compatibility

Commonly used on:

• Mercury / Mariner DFI outboard serpentine belt drive systems

• Selected 135HP, 150HP and 175HP DFI outboard applications

Typically suits:

• Engine models:

• Mercury 135HP DFI, 1998 and newer application range

• Mercury 150HP DFI, 1998 and newer application range

• Mercury 175HP DFI, 2001 and newer application range

• Mercury / Mariner DFI outboards using 57-828507Q4 accessory drive belt

• Mercury service applications replacing 57-8285072 and 57-8285074 belt references

• HP Range: 135HP - 175HP

• Engine Type: Mercury / Mariner DFI outboard accessory drive belt system

• Year Range: Approximately 1998 onwards for 135HP / 150HP DFI and approximately 2001 onwards for 175HP DFI, depending on model and serial number

🔌 Function

The serpentine belt drives engine accessories from the crankshaft pulley. Correct belt tension and condition are essential for reliable accessory operation and consistent engine performance.

Common signs of failure:

• Squealing or chirping belt noise

• Visible cracking or glazing on belt ribs

• Belt fraying or missing ribs

• Accessory drive slipping

• Charging or accessory performance issues

• Belt dust around pulleys

• Belt thrown from pulley alignment issue

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging