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Description
Serpentine Belt – Fits MerCruiser 5.0L/5.7L/6.2L/7.4L (Replaces 57-865615Q06)Serpentine Belt Fits MerCruiser 5. 0L 5. 7L 6. 2L 7. 4L (Replaces 57 865615Q06) This serpentine belt is designed to fit MerCruiser 5. 0L, 5. 7L, 6. 2L, and 7. 4L inboard and sterndrive engines manufactured between 1998 and 2004. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring reliable power transmission for Alpha and Bravo applications. It is a direct replacement for Mercury MerCruiser part numbers 57
Serpentine Belt – Fits MerCruiser 5.0L/5.7L/6.2L/7.4L (Replaces 57-865615Q06)
This serpentine belt is designed to fit MerCruiser 5.0L, 5.7L, 6.2L, and 7.4L inboard and sterndrive engines manufactured between 1998 and 2004. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring reliable power transmission for Alpha and Bravo applications.
It is a direct replacement for Mercury/MerCruiser part numbers 57-865615Q06, 865615Q06, 57-865615006, 57-8638766, 57-8610491, and Sierra 18-15102.
- Installation Method: Direct OEM replacement
- Material: Constructed with high-strength rubber cords for durability and longevity.
- Dimensions: The belt has a length of 2,667 mm (105 inches).
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury / MerCruiser | 57-865615Q06 |
| Mercury / MerCruiser | 865615Q06 |
| Mercury / MerCruiser | 57-865615006 |
| Mercury / MerCruiser | 57-8638766 |
| Mercury / MerCruiser | 57-8610491 |
| Sierra | 18-15102 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| MerCruiser | 5.0L Alpha | 4-Stroke | 2000-2004 | 57-865615Q06 | From serial OL619000 & OM600000 |
| MerCruiser | 5.0L Bravo | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 350 MAG Alpha | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 350 MAG Bravo | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 350 MAG MPI Alpha/Bravo EC | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 350 MAG MPI Horizon Alpha/Bravo EC | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 5.7L Alpha | 4-Stroke | 2000-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 5.7L Bravo | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | MX 6.2L MPI | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | MX 6.2L MPI Horizon | 4-Stroke | 2002-2004 | 57-865615Q06 | From serial OM600000 |
| MerCruiser | 454 MAG MPI | 4-Stroke | 1998-2001 | 57-865615Q06 | Serial OL010029-OM024999 |
| MerCruiser | 502 MAG MPI | 4-Stroke | 1998-2001 | 57-865615Q06 | Serial OL017000-OM024999 |
| MerCruiser | 7.4L MPI | 4-Stroke | 1998-2001 | 57-865615Q06 | Serial OL010003-OM024330 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Serpentine Belt |
| Installation | Direct OEM replacement |
| Length | 2,667 mm (105 inches) |
| Application | Power transmission between engine components |
| Material | High-strength rubber cords |
| Compatibility | Alpha and Bravo applications |
| OEM Part Number | 57-865615Q06 |
Package Contents
- 1 x Serpentine Belt (57-865615Q06)
Installation Guide
- Safety First: Ensure the engine is off and cool, and disconnect the battery's negative terminal.
- Locate the Belt: Identify the serpentine belt and its routing path around the pulleys. It's helpful to take a picture or find a diagram for your specific engine model.
- Release Tension: Locate the automatic belt tensioner. Use a socket or belt tensioner tool to rotate the tensioner, releasing the pressure on the belt.
- Remove Old Belt: While the tension is released, carefully slide the old belt off the pulleys.
- Inspect Pulleys: Before installing the new belt, check all pulleys for wobble, damage, or seizure. Spin them by hand to ensure they rotate smoothly.
- Install New Belt: Following your diagram or photo, route the new belt around the pulleys, saving the tensioner pulley for last.
- Apply Tension: Slowly release the tensioner back to its original position to apply tension to the new belt. Ensure the belt is properly seated in all pulley grooves.
- Final Check: Reconnect the battery, start the engine, and listen for any unusual noises. Let it run for a minute to confirm the belt is tracking correctly.
Troubleshooting & FAQ
How do I confirm this fits my engine?
To ensure compatibility, check your engine model, year, and serial number against the "Compatible Engine Models" table above. This belt replaces OEM part number 57-865615Q06. Verifying your existing part number provides the best confirmation of fitment.
What are the signs of a failing serpentine belt?
Common symptoms include loud squealing or chirping noises from the engine bay, visible cracks, frays, or glazing on the belt's surface, and intermittent or complete failure of belt-driven accessories like the alternator, power steering pump, or water pump.
How often should I replace my serpentine belt?
Refer to your engine's service manual for specific maintenance intervals. As a general guideline, serpentine belts should be inspected for wear and damage at every service and typically replaced every 3 to 5 years, depending on usage and conditions.
OEM vs. Aftermarket?
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.
How fast do you ship and how much does it cost?
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.
What is your warranty and return policy?
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:
- 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
4.1 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Great and Easy to Use!
Size: 11S
Background: I have a shedding dog, so I bought this in hopes that by running it every-day, it would pick up on some of the dog hair on the floor.
What I like:
-VERY easy to use.
-easy to follow instructions
-has a sticker on the bottom so if it ever stops and beeps, you can flip it over and it says exactly what the beeps mean (one beep means one thing, two beeps means another--which is SUPER helpful!).
-color on top clearly shows what mode it is in (blue-ready to go, orange-needs to charge, red-problem to fix-such as emptying the tray).
-very quiet. I can work on stuff with it in the room and it does not bother me at all (my dog also does not mind it).
-works great on white carpet and easily transitions from my living room to dining room (which has a slight bump).
-when its low on battery, it does not die where it is at, it just turns off the vacuum then finds the home doc and charges itself.
-just works really well. I run it everyday and I am impressed by how much stuff it gets (especially when it goes under things such as the couch).
-if it gets caught on a cord, it usually takes 5-10 seconds but then it stops the suctioning and moves away (releasing the cord or other item). However if you have a small cord you should put it up (and you should regardless, I just noticed it doing this a few times and thought it was neat, but I do try to pick up all cords).
What could be improved:
-nothing really in particular to this.
-It does not work well on anything black, but this is true for all robot vacuums. It sometimes gets stuck when it goes on the black carpet we have with the black chairs (I suspect because it can not detect them), but this has not happened often. My dog has a black mat for her food and water and it always bumps into it and spills the water, but again, this would occur with any robot vacuum.
-Also, make sure the doc is against a wall because otherwise it will move and never charge (self explanatory, but I did not do the first time and it kept trying to doc and was just pushing the doc around the floor).
-Finally, you do have to dump out the vacuum particles almost every time you run it (if you do a full circle/battery cycle). It is really easy to dump and beeps when it needs to be emptied. Again, nothing really negative, just something to note.
Overall, I really like this! It does a nice job cleaning up the dog hair and other things that get on my floor and saves me a lot of time not vacuuming daily. If you have a dog, I would watch them with this first before you use it. My dog was initially scared of it but sniffed it's "butt" and now they are cool and she does not mind it at all. Pleased with this product and would recommend! :)
**UPDATE**
On another note, Eufy has amazing customer service! I received an email from them addressing each of my "what could be improved" components with more information on the product. Very impressed.
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Reviewed in the United States on August 5, 2018
★★★★★ 5
ROB is amazing.
Size: E25 Black
I have to first explain that I have named my E25, his name is now ROB and will be referred to as ROB going forward.
ROB has been an amazing addition to our family and yes I said Family. ROB was easy to set up, all instructions were clear and easy to follow.
The first day, I followed ROB everywhere afraid he would get stuck on a rug, or would have difficulty making it over the transitions of our flooring. But ROB had no problems what so ever. And honestly, I found myself amazed at the quality and endurance of ROB. He was jumping over transitions, flipping from mop to vacuum at the proper times and would suck up a dog hair bunny from 3 feet away! As a home with 2 big dogs (over 100 pounds each) that looses enough fur to make a new sweater everyday, ROB has done an amazing job! It’s been a week with ROB and I have found that he takes no prisoners, there was an area that I didn’t want him going into because I had boxes laid out, I was lazy and just made a make shift barrier so he wouldn’t proceed through the area, but ROB was persistent and was able to move the barrier so he could do his job. So, if you want a robot that will jump a shoe wall, ROB is your man! ROB navigates around a dog toys, around dog bowls, and can even get rid of the doggy dribbles when they drink.
I have ROB set up to vacuum during the day and at night, he vacuums and mops. My 2 dog sons and my family are all happy with ROB as he is quiet and doesn’t scare them. Most days they just watch ROB do his magic on our floors. ROB also cleans himself, he will run home to clean his butt after mopping and will empty his own debris from his vacuuming. I really don’t know how I survived without ROB this long!! I waited 6 months before I finally purchased ROB after seeing his brother BOB in action at my Cousins house. So don’t be like me and wait, just make the purchase. You won’t regret it.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Probably the best robot vacuum mop you can buy in this price range
Size: E25 Black
Its pretty solid device. Honestly its so smart that it vaccumed and mopped my bathroom and ofcourse the wet hair stuck on the wet floor wasnt vacuumed the first pass but it then waited for the second pass to pick it up when it was dry. Made my entire house look so clean its actually amazing. It actually mops and get all the corners with dust. One thing thouhh is the side brushes tend to get tangled with hair and thread but uts very snap on snap off brushes so removing the stuck hair is super easy and only sometimes happens. The suction is amazing too its very strong. It moos the floor with clean water with solution so its actually cleaning well. Overall 10/10
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Reviewed in the United States on May 7, 2026
★★★★★ 5
The best vacuum cleaner ever!!
Size: E25 Black, Size: E25 Black
⭐⭐⭐⭐⭐ I honestly couldn’t be happier with the Eufy E25. I actually own two of them, and they’ve completely changed my daily routine. After spending a lot of money trying different brands, I finally found one that truly delivers everything I need in a vacuum.
The suction power is impressive, it handles pet hair and debris effortlessly, and the mopping feature actually works (not just a light wipe like others I’ve tried). The self-emptying and self-cleaning system is a game changer—it saves so much time and maintenance.
Navigation is smart and reliable, and it rarely gets stuck. It covers my floors efficiently and leaves everything noticeably cleaner. I also love how low-maintenance it is overall.
If you’re tired of wasting money on vacuums that don’t live up to expectations, this is absolutely worth it. For me, it has truly been life-changing.
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Reviewed in the United States on April 10, 2026
★★★★★ 3
Updated 1/28/2020 update 1/17/2020 It's been everything it was advertised to be and more. (Not)
Size: 11S
I called Amazon again today. Explained the situation and that no one from Amazon or Eufy had returned my calls as they promised. Also after replacing the battery at my own expense it ran 90 minutes again but got stuck everywhere, made this weird ratcheting type noise every time it changed surfaces and finally today just beeped at me twice and died. Supposedly that indicates a seized brush but they all spin freely. This time I just flat out asked them to look at my Amazon account and replace it, as I'm a very good customer. New one will be here tomorrow. I'll do a separate review on that one as it took me forever to find this one again. I'll also let you know if it's a refurbished unit or not.
Well wouldn't you know it. I leave a nice review and a few days later, Murphy's law rears it's ugly head. Device is 3 months old a couple weeks out of the exchange warranty and the battery is shot. Runs 5 or 10 minutes on a full charge. Called Amazon to see if since I am a really long standing customer if they'd help me out. Nope but we'll call Eufy support on your behalf and they will call you. We will also call you to follow up. I've been a customer service manager a lot of years and this is where employees can kill you. This Amazon person made me multiple promises. It's been a week no call from Eufy, no call from Amazon. You just turned 4 stars into 1 and if this is all the longer the batter lasts don't bother because the replacements are $25 to $30 bucks depending on the brand. I'm not spending a hundred bucks a year on batteries and this thing should be under warranty. After 3 days I ordered a new battery and Rosie is running again but I'm no longer pleased and the next time I'll buy another brand. If if this battery doesn't last the whole thing goes in the trash and I buy something else. I run this every day maybe the batteries won't take that I don't know. But if you're going to run it every day buy something else. This didn't last long enough at all.
I wanted to wait a while to be sure I had a good sampling and could post a fair and useful review. It's been 90 days now. We have two large (bigger than standard) labradoodle puppies. 85 and 50 pounds and they're 1st generation so they shed a lot. They also, being puppies, have tore the yard up so it is basically a mud pit and they wrestle, run, and fight constantly. They put a lot of dirt and hair on the floors and in the air. We run "Rosie" every day. Yes my wife named it. It does an amazing job on our hardwood floors and throw rugs. It gets all the hair and an incredible amount of dust and dirt. What I mean by that is we can run our Dyson or the Shark Pet vacuum and then run Rosie and the chamber will be full of dust and dirt when she's done. It's almost disconcerting to know our very expensive upright vacuums leave so much behind. It also has the unadvertised ability to buff our hardwood floors. They shine when she's done and the beater brush is showing no signs of damaging the finish on our floors. I would disagree with some of the reviews and even the manufacturers assertion that it doesn't work well on dark floors. Our hardwood floors are a dark reddish brown. The device works great on them and as I said when it's finished they shine. We have agreed we will never be without one and love this device. It does everything it has been advertised to do and more. Also it is set to automatic power and runs longer than the advertised time on a full charge. We get about 2 hours and 15 minutes. We've put down an additional 6 throw rugs for the rainy snow season in the path where the dogs run when they come in and the time has dropped to around 90 to 100 minutes. Still long enough to cover everything well and more than once. It does keep going until it needs a charge it doesn't just run and go back to the dock. I've noticed in the open areas like our living room it might hit that 2 or even 3 times. The floors are like glass after that.
Now for the negatives, and these are not deal breakers I'm just being fair. The dirt and dust I referred to is new to us. we recently moved from Illinois to Ohio. In Illinois the dirt is black. Here it is red or a very light brown. The vacuum gets externally dirty. It gets covered with dust/dirt and does not look good. The device is black and the dust is light colored and is readily apparent. I don't want to put it away all the time or for company so thats a problem for me and more cleaning which is not advertised so I'm mentioning it. Secondly it needs to be emptied every use or every other use. They are all like that except some of the super expensive robot vacuums so I wouldn't mention it except for my third negative. It is hard to clean from a mess standpoint. Not so much with the pet hair but with the dust. When you dump it the dust goes everywhere. Unless you have an empty trash can so you can get it way down inside when you're done the garbage can lid and sometimes the floor around the garbage can is clearly dusty from emptying the vacuum. The filters need to be removed at least every other running and they are also a big dusty mess. I also don't believe they will last as long as advertised. I have an air compressor in the garage and a hand held electric air compressor and use those to clean the filter. The foam piece I rinse in the sink. I don't think that someone without access to those tools is going to get the life out of the filters thats advertised. The device comes with a set of replacement filters and the rotating brushes. Not the beater bush though. Our unit is 3 months old. I had to replace the filters at about 40 days and tried to make them last a little longer this time but it hasn't worked out. The outside of the device is filthy. I believe this is due to the filters. The brushes have lasted longer than the suggested replacement time. They are 90 days old and still look like new. Last and has been a rare negative. The device will get stuck under things. Once I learned what the obstacles were in our home it was easy to fix. Some areas I blocked with rolled up moving blankets. I pull the chairs out from under the kitchen table to allow room for it to maneuver. If I don't it gets under there and spends way too much time cleaning and trying to get out. I'd rather it spend less time under there so it can do the whole cleaning area and have power left to do it again. I had the problem spots corrected and figured out within the first 30 days. I've read some units have a tape or something the vacuum will sense and avoid. I wish this unit had that but then again at this price point that is probably an unfair expectation.
So those are the pro's and con's we've encountered. The con's are all minor irritants and not a reason not to buy the device as all of these devices are prone to these issues except one or two of the very very expensive units. To repeat what I said earlier this device has worked out so well we have decided that we will never be without one and that when the time comes to replace her we will not feel bad about spending the money for a high dollar unit as it is worth it. Time is worth more to us than money and this thing saves us a great deal of time. It does great job, has done no damage to anything, and if it weren't for the clean up issues would be a five star review. I hope this helps someone make an informed decision and I hope you buy one. It's an amazing little machine, stands up to all the reviews, and truly is the best bang for your buck in robot vacuums.
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Reviewed in the United States on January 1, 2020
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