Description
SIERRA Cogged V-Belt, 29 in. x 29/64 in. – 18-15290 is a marine replacement cogged V-belt built to transfer accessory-drive load while maintaining flexibility and stable pulley contact.
This belt has an effective length of 29 in. (73.7 cm) and a 29/64 in. (11.5 mm) top width. Use the OEM references below to confirm the correct belt for the engine and accessory-drive layout.
Key Features
- High-strength synthetic cords resist shock loading
- Low-stretch construction helps maintain consistent belt performance
- Rubber compression section transfers load smoothly to the cords
- Precision-moulded cogs improve flexibility and provide cooling airflow
- Rubber sidewalls maintain positive contact with pulley grooves
Specifications
- Manufacturer Part Number: 18-15290
- Belt Type: Cogged V-belt
- Effective Length: 29 in. / 73.7 cm
- Top Width: 29/64 in. / 11.5 mm
- Application: Selected MerCruiser raw-water-pump/fan accessory drives
Interchange / Cross Reference
- Mercury/MerCruiser 57-13457
- Mercury/MerCruiser 57-13457T
Always match the original OE belt number and accessory configuration; similar engine models can use different belt lengths.

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