Sierra Serpentine Belt 18-15101, Replaces 57-8638764, Mercruiser Stern Drive, 76.5 x 13/16 Inch

The Sierra 18-15101 serpentine belt is a replacement drive belt built for Mercruiser stern drive applications. It is engineered to OEM quality standards, meaning it is designed to always be correct in fit, form, and function on the applications it covers, so installation is a direct swap without modification.

The belt is constructed from high quality polychloroprene rubber combined with polyester fiber tensile members. This combination gives the belt oil resistance and temperature stability as standard features, which helps it hold up under the heat and exposure to fuel and oil residue common in a marine engine compartment. The belt measures 76.5 inches in length and 13/16 inch in width, and is finished in black.

This serpentine belt drives engine-mounted accessories on Mercruiser stern drive setups and is cross-referenced to the OEM part number 57-8638764, so it can be ordered as a direct replacement using either that OEM number or the Sierra part number 18-15101. Sierra backs this belt with its standard warranty coverage.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-15101
• Product Type: Serpentine Belt
• Length: 76.5 inches
• Width: 13/16 inch
• Material: Polyester, Rubber
• Color: Black
• Weight: 0.4 pounds
• Compatible Application: Mercruiser stern drive
• OEM Cross Reference: 57-8638764

Fitment

• Mercruiser stern drive

Replaces (OEM)

• 57-8638764

Frequently Asked Questions

What does the Sierra 18-15101 serpentine belt fit? The Sierra 18-15101 serpentine belt is designed for Mercruiser stern drive applications.

What is the OEM equivalent for part 18-15101? Part 18-15101 cross-references to OEM number 57-8638764, so either number can be used to identify the correct replacement belt.

What size is this serpentine belt? The 18-15101 belt measures 76.5 inches in length and 13/16 inch in width.

What material is the 18-15101 belt made from? It is built from high quality polychloroprene rubber with polyester fiber tensile members, giving the belt oil resistance and temperature stability.

Is the Sierra 18-15101 belt OEM quality or aftermarket? It is a Sierra aftermarket belt engineered to OEM quality standards, meaning it is designed to always be correct in fit, form, and function for the applications it covers.

What color is the 18-15101 serpentine belt? This belt is black, consistent with standard automotive and marine serpentine belt construction.

How much does the 18-15101 belt weigh? The Sierra 18-15101 serpentine belt weighs 0.4 pounds.

Does the 18-15101 belt come with a warranty? Yes, the Sierra 18-15101 serpentine belt is backed by Sierra's standard warranty coverage.

Is installation of the 18-15101 belt a direct replacement? Yes, because it is manufactured to OEM quality specifications, the 18-15101 belt installs as a direct swap on Mercruiser stern drive applications it covers without modification.

What is included when ordering part 18-15101? Ordering Sierra part 18-15101 includes one serpentine belt sized at 76.5 inches by 13/16 inch.