Serpentine Belt – Fits Mercury Verado 135-400HP (Replaces 57-880566Q14, 880566Q14, 8M0232583)
Serpentine Belt – Fits Mercury Verado 135-400HP (Replaces 57-880566Q14, 880566Q14, 8M0232583) is backordered and will ship as soon as it is back in stock.
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Serpentine Belt – Fits Mercury Verado 135-400HP (Replaces 57-880566...
Serpentine Belt – Fits Mercury Verado 135-400HP (Replaces 57-880566Q14, 880566Q14, 8M0232583) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Serpentine Belt is designed for a precise fit on Mercury Verado 4-stroke engines, covering 4-cylinder models from 135HP to 200HP (2004–present) and 6-cylinder models from 200HP to 400HP. It is a vital component for driving the engine's supercharger and other essential accessories, ensuring reliable performance on the water.
It serves as a direct replacement for Mercury OEM part numbers 57-880566Q14, 880566Q14, and 8M0232583, as well as Sierra part 18-15128.
- Engine-specific replacement ensures proper fit and function.
- Drives the supercharger, alternator, and water pump.
- Recommended replacement every 300 hours (or 100 for high-performance use).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 57-880566Q14 |
| Mercury | 880566Q14 |
| Mercury | 8M0232583 |
| Sierra | 18-15128 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner Verado owners, please verify your engine’s serial number (SN) against the ranges listed to ensure perfect fitment. Note the distinction between pre-Gen V and Gen V 6-cylinder models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | Verado 4-Cylinder | 135 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B311420 & above |
| Mercury | Verado 4-Cylinder | 150 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B311420 & above |
| Mercury | Verado 4-Cylinder | 175 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B311420 & above |
| Mercury | Verado 4-Cylinder | 200 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B311420 & above |
| Mercury | Verado 6-Cylinder | 200 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B390143-2B144127 (pre-Gen V) |
| Mercury | Verado 6-Cylinder Gen V | 200 | 4-Stroke | 2014–present | 57-880566Q14 | SN 2B144123 & above |
| Mercury | Verado 6-Cylinder | 225 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B390143-2B144127 (pre-Gen V) |
| Mercury | Verado 6-Cylinder Gen V | 225 | 4-Stroke | 2014–present | 57-880566Q14 | SN 2B144123 & above |
| Mercury | Verado 6-Cylinder | 250 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B390143-2B144127 (pre-Gen V) |
| Mercury | Verado 6-Cylinder Gen V | 250 | 4-Stroke | 2014–present | 57-880566Q14 | SN 2B144123 & above |
| Mercury | Verado 6-Cylinder | 275 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B390143-2B144127 (pre-Gen V) |
| Mercury | Verado 6-Cylinder Gen V | 275 | 4-Stroke | 2014–present | 57-880566Q14 | SN 2B144123 & above |
| Mercury | Verado 6-Cylinder | 300 | 4-Stroke | 2004–present | 57-880566Q14 | SN 1B390143-2B144127 (pre-Gen V) |
| Mercury | Verado 6-Cylinder Gen V | 300 | 4-Stroke | 2014–present | 57-880566Q14 | SN 2B144123 & above |
| Mercury | Verado 6-Cylinder | 350 | 4-Stroke | 2015–present | 57-880566Q14 | SN 2B141617 & above |
| Mercury | Verado 6-Cylinder | 400 | 4-Stroke | 2015–present | 57-880566Q14 | SN 2B141617 & above |
| Mercury | Verado 400R Racing | 400 | 4-Stroke | 2015–present | 57-880566Q14 | 100 hour replacement interval recommended |
Technical Specs
- Product Type
- Serpentine Belt
- Installation
- Engine-specific replacement
- Housing Color
- Black
- Dimensions
- Length: 394 mm (15.5 in), Width: 95 mm (3.75 in), Height: 25 mm (1 in)
- Weight
- 0.09 kg (0.2 lb)
- Fitting Type
- Pulleys: Crankshaft, Water Pump, Alternator, Power Steering (if applicable)
- Other Technical Attributes
- Drives the engine supercharger and essential accessories; Recommended replacement interval: 300 hours (100 hours for high-demand applications like Mercury Racing 400R)
What’s in the Box
- 1 x Serpentine Belt (Replaces 57-880566Q14/880566Q14/8M0232583)
Installation Notes
- Ensure the engine is off and cool, then disconnect the battery.
- Loosen the alternator pivot bolt and any tensioner bolts.
- Note the belt's path around the pulleys before removal.
- Relieve tension by swiveling the alternator or tensioner and slip the old belt off.
- Inspect all pulley grooves for wear or rust and clean them thoroughly.
- Route the new belt along the correct path, ensuring it is seated in all grooves.
- Apply tension by swiveling the alternator; proper tension allows for about 1 cm (½") of deflection on the longest span with moderate thumb pressure.
- Tighten the adjuster-plate bolt first, then the main pivot bolt to factory torque specifications.
- Reconnect the battery.
- Start the engine and briefly run it to check that the belt is tracking smoothly and centered.
- Shut down the engine and recheck tension, adjusting if necessary as new belts can stretch slightly.
Troubleshooting & FAQ
What are the signs of a failing serpentine belt?
Common symptoms include visible cracks, fraying, or a glazed, shiny appearance on the belt's surface. You might also hear persistent squealing or chirping noises coming from the engine bay, especially during startup or when accelerating.
How often should I replace this belt?
The recommended replacement interval is every 300 hours of standard operation. For high-demand applications, such as on Mercury Racing 400R engines, a more frequent interval of 100 hours is advised to ensure reliability.
Will this belt fit my Verado engine?
This belt fits a wide range of Mercury Verado engines from 135HP to 400HP, including 4-cylinder and 6-cylinder models. To guarantee a perfect match, please consult the detailed compatibility table and cross-reference your engine's model, year, and serial number.
What is the function of this serpentine belt?
This belt is a critical component that transfers power from the crankshaft to drive the engine's supercharger and essential accessories, such as the alternator (which charges the battery) and the water pump (which circulates coolant).
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9001 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.
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