Part Number: 725018
Indmar 725018 Alternator Belt
Keep your engine’s charging system reliable with the Indmar 725018 Alternator Belt. This OEM V-belt is built to match original Indmar specifications, providing the correct length and profile needed for proper tension and consistent alternator performance.
Over time, belts can wear, stretch, or glaze, leading to slipping, noise, or reduced charging output. Replacing your belt with the proper factory-fit option helps restore steady voltage and keeps your electrical system operating as intended. The 725018 is designed for marine use, offering durability against heat, moisture, and continuous vibration in the engine compartment.
As a direct replacement, it installs easily and maintains proper alignment on compatible pulley systems, helping ensure smooth operation without unnecessary adjustment or guesswork.
Common Engine & Boat Fitments
The 725018 alternator belt is typically used on Indmar engines with V-belt drive systems, commonly found on GM-based 5.0L and 5.7L platforms from the late 1990s through early 2000s.
Typical applications include:
- Supra Sunsport, Supra Comp, and Supra Launch (Indmar-powered models)
- Moomba Outback, Moomba Mobius, and Moomba Outback LS
- Malibu Sunsetter and Malibu Response with Indmar engines
- MasterCraft ProStar 190 and MasterCraft Maristar (Indmar-equipped models)
These boats rely on belt-driven accessory systems, making proper belt condition essential for maintaining consistent charging and overall engine performance.
Fitment can vary based on pulley configuration and model year, so confirming compatibility with part number 725018 is recommended before ordering.
Key Features
- Genuine Indmar OEM V-belt
- Designed for reliable alternator drive performance
- Helps maintain consistent battery charging
- Durable construction for marine environments
- Direct-fit replacement for easy installation
If your belt is showing signs of wear or slipping under load, replacing it is one of the simplest ways to prevent charging issues on the water. The Indmar 725018 alternator belt delivers the fit and dependability your engine was designed for.