Seller notes

Product DescriptionSierra 18-15100 serpentine belt. Dimensions are 13/16 x 106.25. For MerCruiser engines. Replaces Mercury Marine 57-8638763. About Sierra Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in w...

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