5774271T Mercury MerCruiser V Belt | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Water Pump V-Belt - Part Number: 57-74271T

Genuine Quicksilver/MerCruiser water pump V-belt for compatible MerCruiser stern drive and inboard engine applications. This OEM belt is designed to drive the water pump or accessory pulley system correctly, helping maintain reliable cooling-system operation and accessory drive performance.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM V-belt

• Water pump / accessory drive belt application

• 35" belt reference for compatible MerCruiser applications

• Direct replacement for earlier Mercury 57-74271 belt references

• Helps maintain correct cooling pump and accessory drive operation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 57-74271T → Supersedes 57-74271

• 57-74271 earlier OEM reference

OEM / Related Numbers:

• 57-74271T

• 74271T

• 5774271T

• 57-74271

• 74271

• 74271Q related service reference

Aftermarket / Verified Equivalents:

• Sierra: 18-15345

🚤 Compatibility

Commonly used on:

• MerCruiser stern drive and inboard water pump / accessory belt drive applications

• MerCruiser petrol engine pulley systems where 57-74271T is specified

Typically suits:

• Engine models:

• MerCruiser 120HP 4-Cylinder stern drive applications using 57-74271T belt

• MerCruiser 140HP 4-Cylinder stern drive applications using 57-74271T belt

• MerCruiser 165HP inline 6-cylinder applications using the matching 35" water pump belt

• MerCruiser 470 / 485 / 488 3.7L 4-Cylinder applications where 57-74271T is specified

• MerCruiser 888 Ford V8 applications where 57-74271T is specified

• MerCruiser 898 GM V8 applications where 57-74271T is specified

• MerCruiser 228 / 230 / 260 V8 stern drive applications where the 35" water pump belt is specified

• MerCruiser inboard / stern drive accessory belt locations requiring OEM 57-74271T

• HP Range: Application dependent across MerCruiser petrol stern drive and inboard packages

• Engine Type: MerCruiser petrol engine water pump / accessory drive belt system

• Year Range: Application dependent by engine model, pulley layout and parts diagram

🔌 Function

The V-belt transfers engine rotation from the crankshaft pulley to the water pump or accessory pulley system. A correct belt helps maintain water pump operation, cooling performance and reliable accessory drive function.

Common signs of failure:

• Belt squeal or chirping noise

• Visible cracking or glazing

• Belt fraying or missing material

• Overheating caused by poor water pump drive

• Accessory pulley slipping

• Belt looseness or poor tension

• Belt thrown from pulley alignment issues

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging