Serpentine Belt – Fits MerCruiser V6/V8 (Replaces 57-865615-003, 57-865615Q03) 25HP Press firmly from the center

Press firmly from the center outwards to remove any air bubbles

Ensure the engine is off and the seacock is closed before starting

Polyurethane is a superior non-marking material that will not leave scuffs

5 inch (343 mm) Zinc Plated/Stainless Steel For keel rollers 5/8 inch (15

or dirty exhaust smoke

Serpentine Belt – Fits MerCruiser V6/V8 (Replaces 57-865615-003, 57-865615Q03) 25HP Press firmly from the centerProduct Details This replacement Serpentine Belt is designed for MerCruiser 4. 3L, 5. 0L, 5. 7L, and 6. 2L V6 V8 engines from 19992016. It fits Alpha sterndrives equipped with closed cooling and Bravo sterndrives with standard cooling, ensuring reliable power transmission to engine accessories. It serves as a direct replacement for Mercury MerCruiser part numbers 57 8638763, 57 865615 003, and 57 865615Q03, as well as aftermarket equivalents from