Sierra 118-15550 V-Belt for MerCruiser Stern Drives

The Sierra 118-15550 is a premium replacement V-belt engineered for MerCruiser stern drive applications. This belt replaces Mercury Marine OEM part number 57-13458T and is commonly used in GM 330 454 (1982-1987) and 454 MAG ALPHA GM (1986-1989) engines.

Key Features:

• High-strength synthetic cords resist shockload failure and ensure long-lasting durability
• Low-stretch properties provide uniform performance throughout the belt's service life
• Special rubber compound compression section delivers smooth and even transfer of load forces to the cords
• Precision-molded cogs improve flexibility and maintain consistent cord support
• Cog geometry creates large air circulation areas to keep the belt cool and prevent heat buildup
• Rubber edges maintain positive, no-slip contact with pulley grooves

Sierra V-belts are designed to meet or exceed OEM requirements and are backed by the SeaStar Solutions Two-Year Warranty. This belt is an essential component that transfers power from the crankshaft pulley to the alternator and coolant pumps, making regular inspection and replacement critical for reliable marine engine operation.