Alternator V-Belt – Fits MerCruiser 3.0L/3.0L MPI (Replaces 57-862054Q, 57-862054)
Alternator V-Belt – Fits MerCruiser 3.0L/3.0L MPI (Replaces 57-862054Q, 57-862054) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Alternator V-Belt – Fits MerCruiser 3.0L/3.0L MPI (Replaces 57-862054Q, 57-862054) is backordered and will ship as soon as it is back in stock.
Product Details
This replacement Alternator V-Belt – Fits MerCruiser 3.0L/3.0L MPI 1999 & Up is engineered for reliable power transmission to the alternator on MerCruiser 3.0L and 3.0L MPI (135 HP) 4-stroke engines from 1999 and newer, ensuring your vessel's electrical system performs correctly.
This belt is a direct interchange for several part numbers, including Mercury 57-862054Q, MerCruiser 57-862054, Quicksilver 57-862054Q, and Sierra 18-15114, offering a precise fit and function.
- Installs as a key component of the engine's accessory belt system.
- Designed specifically for marine gasoline engine environments.
- Package contains a single V-belt for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 57-862054Q |
| Mercury | 57-862054 |
| MerCruiser | 57-862054Q |
| MerCruiser | 57-862054 |
| Quicksilver | 57-862054Q |
| Sierra | 18-15114 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 3.0L | 135 | 4-Stroke | 1999–2008 | 57-862054Q | For engines with serial number 0L382122 & up |
| MerCruiser | 3.0L MPI | 135 | 4-Stroke | 1999–2008 | 57-862054Q | For engines with serial number 0L382122 & up |
Technical Specs
- Product Type
- V-Belt (Alternator Belt)
- Installation
- Engine Accessory Belt System
- Fuel Type
- Gasoline
- Dimensions
- 1003 mm (39.49 in) length
- Working Pressure
- Standard tension per engine specification
- Other Technical Attributes
- Replacement for alternator drive V-belt on MerCruiser engines
What’s in the Box
- 1 x V-Belt (57-862054Q)
Installation Notes
- Disconnect the battery's negative terminal to ensure safety.
- Locate the alternator and identify the belt tensioner mechanism.
- Loosen the tensioner to create slack in the old belt.
- Carefully remove the old belt from all pulleys.
- Route the new belt according to your engine's diagram, ensuring it is properly seated in each pulley groove.
- Apply tension to the new belt as specified in your engine's service manual. Avoid over-tightening.
- Secure the tensioner and any other loosened components.
- Reconnect the battery, start the engine, and verify the belt is running smoothly and quietly.
Troubleshooting & FAQ
How do I confirm this belt fits my specific engine?
This V-belt fits MerCruiser 3.0L and 3.0L MPI models from 1999–2008 with serial number 0L382122 and higher. Always compare your old part number to the references in our Part Number Matrix, such as 57-862054Q, to guarantee fitment.
What are the signs of a failing alternator belt?
Key indicators include a loud squealing noise from the engine, visible glazing or cracks on the belt surface, a battery warning light on the dashboard, or engine overheating. Any of these signs suggest an immediate inspection is needed.
How often should I replace my alternator belt?
Refer to your engine's service manual for specific maintenance intervals. As a general guideline, inspect the belt annually for signs of wear, such as fraying or cracking, and replace it proactively to avoid failure.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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