Our Delco 10SI alternator is outfitted with a spark-arresting screen to conform to Marine specifications and they are available in upgraded amperages to handle additional electrical loads. These are a 1-wire hookup for easy wiring. This unit will replace a number of OEM Motorola and Mando type alternators. Pick the alternator that matches your old unit from the mounting styles pictured below. Please contact us if you have any question concerning compatibility with your existing alternator.

Straight across mounting ears with 2 Off-set mounting ears with 2 Three hole top mount and 1 inch pivot ear Three hole top mount and double foot lower mounts

2 inch pivot ear Off-set top and bottom ears 1 inch pivot ear J-Mount ears

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Professional Marine Alternators Built for the Water

Corrosion-Resistant Charging Systems – Engineered for Harsh Marine Environments

Power your vessel with confidence using Quality Power's marine-grade alternators. Specifically designed to withstand saltwater exposure, constant vibration, and demanding electrical loads, our charging systems deliver the reliability serious boaters require.

Marine-Specific Engineering Excellence

Saltwater-Ready Construction – Every alternator features specialized coatings and corrosion-resistant materials designed for marine environments. Built to survive what destroys standard automotive alternators.

Continuous-Duty Performance – Marine applications demand sustained output at constant RPM. Our alternators excel in conditions where standard units overheat and fail.

Vibration-Resistant Design – Reinforced internal components and robust mounting systems handle the constant vibration and shock inherent in marine applications.

Marine Charging Solutions That Perform

Boat Alternator Heavy Duty Replacement – Rugged replacement solution for standard marine electrical needs. Built tougher than automotive units with enhanced sealing and corrosion protection for extended saltwater service.

Marine Alternator 200 Amp Upgrade – Strong charging capacity for fishing boats, cruisers, and recreational vessels. Powers navigation equipment, fish finders, communication systems, and onboard accessories with consistent reliability.

Marine Alternator 250 Amp High Output – Robust solution for larger vessels with extensive electrical demands. Handles multiple battery banks, refrigeration systems, water makers, and comprehensive electronics packages.

High Amp Alternator for Boats – Maximum output options for commercial vessels, charter operations, and serious offshore boats. Delivers the sustained amperage needed for professional marine applications and extended offshore passages.

Built for Marine Professionals

Charter Captains: Ensure passenger comfort and safety with dependable electrical systems. Power air conditioning, galley equipment, and entertainment systems throughout long charter days.

Commercial Fishermen: Maintain critical equipment operation when your livelihood depends on it. Support hydraulics, freezers, navigation systems, and communication gear without electrical failures.

Offshore Enthusiasts: Trust your electrical system during extended passages. Power autopilot, radar, refrigeration, and safety equipment reliably across long ocean crossings.

Coastal Cruisers: Enjoy worry-free boating with robust charging capacity. Run creature comforts, electronics, and safety systems while maintaining healthy battery banks.

Marine Environment Mastery

Boats present unique electrical challenges that automotive alternators simply cannot handle. Constant moisture, salt spray, engine compartment heat, and extended run times at fixed RPM require specialized engineering.

Our marine alternators feature enhanced ventilation, waterproof connections, and premium bearings designed for marine duty cycles. From calm inland lakes to rough offshore conditions, your charging system performs flawlessly.

Marine-specific technical support available. Professional installation assistance for complex systems.

Don't trust your vessel's electrical reliability to automotive components. Choose Quality Power marine alternators engineered specifically for the demanding environment where saltwater, electronics, and safety converge.