Part Number: 575021SC
Upgrade your charging system with the Indmar 575021SC 170 Amp Alternator, a high-output OEM solution built for Indmar inboard engines with demanding electrical loads. Designed for boats running ballast systems, premium audio, lighting, and multiple accessories, this alternator delivers consistent power and fast battery recovery without sacrificing reliability.
This model features a serpentine pulley and external excitation (SC) configuration, making it a direct-fit option for supercharged and high-performance Indmar engine packages. With 170 amps of output, it maintains stable voltage even under heavy demand, helping prevent voltage drop, dimming, or slow recharge times during long sessions on the water.
Built for marine environments, the 575021SC is constructed to handle heat, vibration, and moisture while maintaining dependable performance over time. It’s commonly used on Indmar Raptor-based engines and similar setups found in modern towboats.
Common fitments include:
- Supra SA, Supra SE, Supra SL, and Supra SG with Indmar Raptor engines
- Moomba Mojo, Moomba Max, Moomba Craz, and Moomba Mondo with Indmar power
- Malibu Wakesetter 23 LSV and Malibu Wakesetter 25 LSV (Indmar-equipped configurations)
- Axis A22 and Axis A24
- Select MasterCraft XStar models with Indmar engines
Fitment varies by engine type and model year, so confirming compatibility by part number (575021SC) or engine specifications is recommended before ordering.
Key Features:
- 170 amp high-output performance for modern electrical systems
- External excitation (SC) design for supercharged and performance engines
- OEM Indmar construction for proper fit and long-term reliability
- Serpentine pulley configuration for efficient operation
- Supports ballast, audio, lighting, and multiple accessories
If your boat is equipped with a supercharged Indmar engine or upgraded electronics, the 575021SC provides the output and dependability needed to keep everything powered and performing at its best.