Part Number: 725901
Indmar 725901 Alternator Belt
Keep your engine’s charging system working smoothly with the Indmar 725901 Alternator Belt. Designed as a direct OEM replacement, this serpentine belt delivers the correct length and rib profile needed for proper tension, quiet operation, and dependable accessory drive performance.
A worn or slipping belt can lead to weak battery charging, inconsistent voltage, or unwanted noise under load. Replacing it with the correct factory-spec belt helps restore steady alternator output and keeps essential systems operating without interruption. Built for marine environments, the 725901 is designed to handle heat, humidity, and constant vibration inside the engine compartment.
This belt is engineered to match original Indmar specifications, making installation straightforward while ensuring proper alignment on compatible serpentine drive systems.
Common Engine & Boat Fitments
The 725901 alternator belt is used on select Indmar engines with serpentine drive systems, commonly found on GM-based platforms such as 5.7L, 6.0L, and 6.2L configurations.
Typical applications include:
- Supra Launch 22 SSV, Supra Launch 21 V, and Supra Sunsport 22 V
- Moomba Mobius LSV, Moomba Outback V, and Moomba Mobius XLV
- Malibu Wakesetter VLX and Malibu Sunsetter LXI with Indmar engines
- Axis A20 and Axis A22
- MasterCraft X2 and select X-Series models with Indmar engines
These boats often rely on consistent alternator performance to support onboard electronics and accessories, making proper belt condition essential.
Fitment can vary depending on engine configuration and model year, so confirming compatibility with part number 725901 is recommended before ordering.
Key Features
- Genuine Indmar OEM serpentine belt
- Designed for reliable alternator and accessory drive operation
- Helps maintain consistent charging system performance
- Durable construction for marine environments
- Direct-fit replacement for easy installation
If your current belt is showing signs of wear, cracking, or slipping, replacing it is a quick and effective way to prevent charging issues. The Indmar 725901 alternator belt delivers the fit and reliability your engine was built to run on.