Indmar 725902 Alternator Belt

Indmar 725902 Alternator Belt

Keep your charging system operating smoothly with the Indmar 725902 Alternator Belt. Designed as a direct OEM replacement, this serpentine belt delivers the correct fit and consistent grip needed to drive the alternator and other engine accessories without slip or noise.

Over time, belts wear, stretch, and lose tension—leading to poor battery charging, squealing, or overheating. Replacing it with the proper factory-spec belt restores reliable performance and helps protect your engine’s electrical system. The 725902 is built for marine use, offering durability against heat, moisture, and constant vibration in the engine compartment.

This belt is engineered to match original length and rib profile, making installation straightforward while ensuring proper alignment and tension on compatible Indmar setups.

Common Engine & Boat Fitments

The 725902 alternator belt is commonly used on Indmar engines equipped with serpentine drive systems, including many GM-based 5.7L, 6.0L, and 6.2L platforms.

Typical applications include:

• Supra Launch 22 SSV, Supra 21 V, and Supra Sunsport 22 V (Indmar-powered)
• Moomba Mobius LSV, Moomba Outback V, and Moomba Mobius XLV
• Malibu Wakesetter VLX and Malibu Sunsetter LXI with Indmar engines
• MasterCraft X2 and MasterCraft XStar (Indmar-equipped models)

These boats often run multiple accessories such as ballast systems and upgraded electronics, making proper belt performance critical for consistent charging.

Fitment can vary depending on engine configuration and model year, so confirming compatibility with part number 725902 is recommended before ordering.

Key Features

• Genuine Indmar OEM serpentine belt
• Designed for reliable alternator and accessory drive operation
• Helps maintain proper charging system performance
• Durable construction for marine environments
• Direct-fit replacement for easy installation

If your belt is worn, cracked, or slipping, replacing it is a simple way to prevent charging issues and keep your boat running smoothly. The Indmar 725902 alternator belt delivers the fit and reliability your engine was designed for.