Serpentine Belt for MerCruiser V8 5.0L-7.4L Engines (1998-2004) (57-865615Q06)

OEM Part Numbers

57-865615Q06, 865615006, 865615Q06

Compatible Models

• MerCruiser
  • MerCruiser 5.0L Bravo/Alpha (2002-2004)  0M600000+ 250-300HP
  • MerCruiser 350 Mag Bravo/Alpha (2002-2004)  0M600000+ 300-350HP
  • MerCruiser 6.2L Bravo/Alpha (2002-2004)  0M600000+ 350-375HP
  • MerCruiser 454 Mag MPI (1998-2001)  0L010029-0M024999 385-425HP
  • MerCruiser 502 Mag MPI (1998-2001)  0L010029-0M024999 385-425HP
  • MerCruiser 7.4L (1998-2001)  0L010029-0M024999 385-425HP

Technical Specifications

Size Information: 2667mm (105") length × 20.6mm (13/16") width

Installation Instructions

1. Ensure the engine is turned off and cooled completely.
2. Disconnect the battery to prevent accidental starting.
3. Loosen the alternator pivot bolt just enough to allow slight movement. Also loosen any adjuster‑plate or tensioner bolts.
4. Identify belt routing. Note the path around the crankshaft, water‑pump, alternator (and power‑steering if applicable) pulleys.
5. Remove the old belt by swiveling the alternator or tensioner to relieve tension, then slip the belt off pulleys.
6. Inspect pulley grooves for wear, rust or corrosion. Clean them to bare metal if needed.
7. Route the new belt following the same pulley path. Ensure it seats properly in all V‑grooves.
8. Tension the belt:
   • Swivel the alternator away from the engine to create proper belt tension.
   • A correctly tensioned V‑belt deflects about 1 cm (½″) under moderate thumb pressure on the longest span.
9. Tighten all bolts: Secure the adjuster‑plate bolt, then the main pivot bolt to factory torque specs.
10. Reconnect the battery.
11. Start the engine, observe belt tracking to ensure it's centered in grooves and running smoothly.
12. Shut down and recheck tension after a short run. Re-tension if necessary (new belts may stretch slightly initially).

Important Notes

• Verify that the product images and specifications match your original part.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Warranty Information

This product comes with a 1-year warranty against manufacturing defects under normal use conditions. Please contact our customer service team for warranty claims or additional product information.

Product Features

• Manufactured to OEM specifications using the exact same material as the originals.
• Produced in an ISO9002 certified factory.

Why Choose JLM MARINE?

• As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Free delivery worldwide in 5-15 days.
• Enjoy competitive prices without compromising quality.

Don't compromise on quality or performance. Choose JLM MARINE for reliable marine parts at competitive prices. Order now to experience the JLM difference.

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