SKU: 90335249585

57-865615Q04 Serpentine Belt for MerCruiser 4.3L 5.0L 5.7L 6.2L | JLM Marine

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Description

57-865615Q04 Serpentine Belt for MerCruiser 4.3L 5.0L 5.7L 6.2L | JLM MarineSerpentine Belt for MerCruiser 4. 3L 5. 0L 5. 7L 6. 2L Part Number 57 865615Q04 This serpentine belt is engineered for MerCruiser sterndrive engines, providing reliable power transmission for 4. 3L, 5. 0L, 5. 7L, and 6. 2L V6 and V8 models from 20002004 and later. It ensures smooth operation of essential engine accessories, delivering consistent performance in marine environments. This belt directly replaces OEM MerCruiser part numbers 57 8638764, 57

Serpentine Belt for MerCruiser 4.3L 5.0L 5.7L 6.2L – Part Number 57-865615Q04

This serpentine belt is engineered for MerCruiser sterndrive engines, providing reliable power transmission for 4.3L, 5.0L, 5.7L, and 6.2L V6 and V8 models from 2000–2004 and later. It ensures smooth operation of essential engine accessories, delivering consistent performance in marine environments.

This belt directly replaces OEM MerCruiser part numbers 57-8638764, 57-862086, 57-8620861, 57-862086A1, 57-865615004, and 57-865615Q04, as well as Sierra Marine part number 18-15101, offering broad compatibility across multiple model years.

  • Fits MerCruiser V6 and V8 sterndrive engines: 4.3L, 5.0L, 5.7L, and 6.2L
  • 76.42" serpentine belt designed for engine accessory drive systems
  • Compatible with serial numbers OL619000 and up (2000–04) and 0M300000 through 0W309999 (6.2L)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
MerCruiser 57-8638764
MerCruiser 57-862086
MerCruiser 57-8620861
MerCruiser 57-862086A1
MerCruiser 57-865615004
MerCruiser 57-865615Q04
Sierra Marine 18-15101

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Years Serial Number Range
MerCruiser 4.3L V6 2000–2004 OL619000 & up
MerCruiser 5.0L V8 2000–2004 OL619000 & up
MerCruiser 5.7L V8 2000–2004 OL619000 & up
MerCruiser 6.2L V8 — 0M300000 through 0W309999

Technical Specifications

Specification Value
Belt Length 76.42 inches
Belt Type Serpentine V Belt
Engine Compatibility MerCruiser 4.3L, 5.0L, 5.7L, 6.2L
OEM Part Number 57-865615Q04

Package Contents

  • 1 × 76.42" Serpentine V Belt

Installation Guide

  1. Disconnect the battery negative terminal to ensure safe working conditions.
  2. Locate the belt tensioner on your MerCruiser engine and identify the routing path for the serpentine belt.
  3. Use a suitable wrench or socket to rotate the tensioner clockwise, relieving tension on the old belt.
  4. Carefully remove the old serpentine belt from all pulleys, noting its routing path (take a photo if necessary).
  5. Inspect all pulleys for wear, damage, or debris; clean or replace as needed.
  6. Route the new 76.42" serpentine belt around each pulley following the correct path (refer to your engine's belt routing diagram).
  7. Rotate the tensioner again and slip the belt onto the final pulley, ensuring it seats properly in all grooves.
  8. Release the tensioner slowly, allowing it to apply proper tension to the new belt.
  9. Verify that the belt is correctly seated on all pulleys and properly aligned.
  10. Reconnect the battery negative terminal.
  11. Start the engine and listen for unusual noises; observe the belt for smooth operation without slipping or vibration.
  12. Perform a final visual inspection after a short run to confirm belt alignment and tension.

Troubleshooting & FAQ

Q: How do I confirm this belt fits my MerCruiser engine?
A: Check your engine model (4.3L, 5.0L, 5.7L, or 6.2L) and serial number against the compatibility table above. If your serial number is OL619000 or higher (for 2000–04 models) or within 0M300000–0W309999 (for 6.2L), this belt is the correct fit.

Q: What are the signs that my serpentine belt needs replacement?
A: Common symptoms include squealing or chirping noises during engine operation, visible cracks or fraying on the belt surface, glazing (shiny appearance), or loss of power to accessories like the alternator or water pump. Replace the belt immediately if you notice any of these signs.

Q: How often should I replace the serpentine belt on my MerCruiser?
A: Inspect your serpentine belt at least once per season or every 100 hours of operation. Typical replacement intervals range from 2–4 years or 200–400 hours, depending on usage and operating conditions. Replace sooner if you observe wear or damage.

Q: Can I install this belt myself, or do I need a professional?
A: If you have basic mechanical skills and the proper tools (wrench/socket for the tensioner), you can install this belt yourself by following the installation guide. However, professional installation is recommended if you're unfamiliar with engine components or belt routing.

Q: Is this an OEM belt or an aftermarket replacement?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90335249585

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Ryan
Phoenix, US
★★★★★ 1
One Star
Format: Paperback
Exactly the same as the free PDF I downloaded online for my student, only this costs $26 plus tax.
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Reviewed in the United States on April 3, 2017
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Christopher West
Bozeman, US
★★★★★ 5
A Treasure Trove for Aspiring Game Developers! From Concepts to Mastery!
Format: Paperback
As someone who has spent nearly two decades deep within the intricate world of C# software development, delving into game development was like stepping into a new dimension, filled with its unique set of challenges and learning curves. It’s an entirely different ball game, albeit an exciting one. My preference for Unity, primarily because of its compatibility with C#, brought me to Scott Tykoshi’s "Mastering Game Design with Unity 2021," and what an enlightening journey it has been! Bridging the Knowledge Gap: The book acts as a bridge between my extensive experience in software engineering and the nuances of game development. Scott has a talent for making complex concepts accessible, and the depth of knowledge shared in this book is invaluable for anyone willing to expand their horizons within the game development ecosystem. Comprehensive and Well-Structured: This book isn’t just a guide; it’s a comprehensive repository of information. It meticulously covers a myriad of topics such as immersive workflows, visual scripting, physics engine, GameObjects, player progression, and publishing. The structured approach helps in assimilating each concept thoroughly before moving on to the next, allowing for a gradual and solid build-up of knowledge. Enlightening Insights into Unity: Being a C# aficionado, Unity was my platform of choice, and this book has only deepened my appreciation for it. It's enlightening to see the seamless integration and the versatility that Unity offers, especially through Scott’s detailed and clear explanations. The practical insights and the in-depth exploration of Unity’s capabilities have empowered me to leverage the platform to its fullest potential. Practical Approach to Learning: Scott Tykoshi’s method of blending theory with practical examples is a boon for learners. The real-world applications and practical exercises resonate well with my learning style, providing a hands-on experience that is crucial for mastering game design. The examples are well-thought-out, relevant, and inject a dose of reality into the theoretical aspects, making the learning process engaging and effective. From Novice to Master: "Mastering Game Design with Unity 2021" lives up to its name, taking the reader on a journey from the basics to the advanced intricacies of game design. Whether it’s understanding the nuances of player progression or getting to grips with visual scripting, the book lays out a clear path for achieving mastery in game design. Conclusion: For seasoned software engineers like myself, making the transition into game development can seem daunting, but "Mastering Game Design with Unity 2021" by Scott Tykoshi has been a beacon of knowledge, guiding me through uncharted territories with ease and clarity. It’s more than just a book; it’s a mentor, a guide, and a companion in the thrilling journey of game development. If Unity and game design are on your radar, consider this book your roadmap to mastery. Whether you’re just dipping your toes in or ready to dive deep, Scott’s insights will illuminate your path and elevate your game design skills to new heights.
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Reviewed in the United States on September 22, 2023
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Aurélien
Battle Creek, US
★★★★★ 5
Great Book for Project-Based Learning
Format: Paperback
As a Unity Instructor I can say the book is really amazing I was expecting that I'd face a basic book, but instead, the book is very complete, even having AR and VR chapters totally adapted to the new version of Unity, which makes it one of the best books to master Unity (if not the best).
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Reviewed in the United States on December 19, 2022
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Bradley Wardell
Lexington, US
★★★★★ 5
Thorough and approachable
Format: Paperback
Mastering Game Design with Unity is a must-have for any developer looking to use Unity as their platform for developing a video game for today's audience. What makes this book particularly compelling is that it goes through the entire game design and development process. From UI design to audio to graphics, this is a book that provides a one-stop shop of knowledge for developers. If you're already a developer or just looking for a book at act as the heart of your Unity development, this is the book to get.
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Reviewed in the United States on February 20, 2023
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Mike Athey
Massapequa, US
★★★★★ 2
Content seems good, but support files/code are insufficient, and the code seems illogical in places
Format: Paperback
This books starts out great and the content/approach seems solid. But I ran into several issues when the coding portions were introduced, notably when it came to collisions and destroying enemy game objects. There's scripting to set up a bullet behavior, but from the outset the behavior is buggy, and when the "explosion" behavior is introduced, there's no coding to actually destroy the object you're introducing the explosion behavior to. On top of that, the explosion behavior is tied to the playerObj's "onDeath" function, so ... I'm not sure how any of that ties into destroying an enemy game object. This is about 150 pages in. The go-to method in these cases is, of course, to reference the support files, but these files only include the code and the book images. What's really needed is the Unity project files to ensure the code is being implemented in the components of the game objects and seeing the core structure there. With only the scripts, you can only check your scripts against those, but you can't be sure you're utilizing them correctly and tying it all together in Unity. Granted, I'm still learning the platform, but things like where you're expected to fire a bullet that has no "destroy gameObject" function into an enemy gameObject that also has no such behavior ... and the behavior is tied to the player? There's definitely something amiss. All the while you're dealing with "soft locks" in the test gameplay that could have been immediately addressed, but aren't. And you can't really move forward with such core inconsistencies in place because you fear the problems would just compound from there.
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Reviewed in the United States on July 31, 2023

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