Aftermarket Mercruiser 57-865615Q03 Serpentine Belt Aftermarket Mercruiser 57-865615Q03 Serpentine Belt Length: 106.25" (2704mm)Width: 13/16" (33cm/40cm) Interchangeable with the following: Mercruiser Stern Drive57-86208757-862087A157-863876357-86561500357-865615Q03 MSRP: Was: Now: $245.34 Add to Cart