Engine Parts & Service - Alternators
Marine engine alternators are essential for generating reliable charging power and keeping your vessel's electrical system operating at peak performance. Engineered for demanding freshwater and saltwater environments, these marine-grade alternators feature corrosion-resistant construction, durable internal components, and dependable charging output designed to withstand vibration, heat, and harsh marine conditions. From OEM replacement alternators and high-output charging systems to alternator regulators, pulleys, mounting hardware, and service components, these products help maintain consistent power for starting batteries, house battery banks, navigation electronics, lighting, pumps, and other onboard equipment. High-quality marine alternators improve charging efficiency, support modern battery technologies, and help reduce the risk of power loss while underway.
Featuring premium products from trusted brands such as ARCO Marine, Balmar, and other leading manufacturers, our Engine Parts & Service – Alternators collection delivers the quality, durability, and performance serious boaters expect. Browse our selection today and let our knowledgeable team help you choose the ideal alternator or charging component for your vessel's engine.
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- Featured
- Most relevant
- Best selling
- Alphabetically, A-Z
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Vendor:Balmar
Balmar Alternator 120 Amp 12V 3.15" Dual foot Saddle Single K6 Pulley w/Isolated Grounding [60-120-K6]
- $1,061.46
$1,263.56- $1,061.46
- Unit price
- / per
Alternator 120 Amp 12V 3.15" Dual foot Saddle Single K6 Pulley with Isolated GroundingAlternator, 60 Series, 120A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Isolated Ground Hitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre Engines.This product may not be returned to...- $1,061.46
$1,263.56- $1,061.46
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/Multi-Groove Serpentine Pulley - 12V 65A [60060]
- $340.78
$440.58- $340.78
- Unit price
- / per
Premium Replacement Alternator with Multi-Groove Serpentine Pulley - 12V & 65AReplacement alternator that will fit late model Mercruiser, 12 Volt, 65 Amp, Internal Regulator 2-inch mounting foot, Multi-groove serpentine pulley included. Features: All alternators are engineered for performance and reliability All alternators are engineered and...- $340.78
$440.58- $340.78
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]
- $287.70
$377.01- $287.70
- Unit price
- / per
Premium Replacement Alternator with 65mm Multi-Groove Pulley - 12V 70AReplacement alternator that will fit Mercruiser 4.3L - 8.2L, 1998-Up, 12 Volt, 70 AMP, Internal Fan, 65-mm multi-groove serpentine pulley included.Features: All alternators are engineered for performance and reliability All alternators are engineered and manufactured...- $287.70
$377.01- $287.70
- Unit price
- / per
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Vendor:Balmar
Balmar Kit 621 Series 100A Single FT Alt MC Reg T Sensor [621-VUP-MC-100-SV]
- $1,319.85
$1,571.11- $1,319.85
- Unit price
- / per
Kit 621 Series 100A Single FT Alt MC Reg T SensorKit Includes: 621-100-SV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware621-100-SV Alternator: 100A, 12V, Spindle Mount (Single Foot), 1-2in, Single Deep Vee Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines2" Delco-Style...- $1,319.85
$1,571.11- $1,319.85
- Unit price
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Vendor:ARCO Marine
ARCO Marine Zeus 24V 7kW 3.15 Alternator w/Isolated Ground [4501]
- $1,994.18
$2,302.99- $1,994.18
- Unit price
- / per
Zeus 24V 7kW 3.15 Alternator with Isolated GroundThe ARCO Zeus 24v 7kW alternator generates extremely high amperage at cruising and higher RPMs. This alternator continuously generates over 3kW (109 Amps) at just under 3,000 alternator RPM and almost 6kW (218 Amps) at under 6,000...- $1,994.18
$2,302.99- $1,994.18
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Outboard Alternator w/Multi-Groove Pulley - 12V 50A [20850]
- $558.66
$727.68- $558.66
- Unit price
- / per
Premium Replacement Outboard Alternator with Multi-Groove Pulley - 12V 50AReplacement alternator that will fit 1.5L & 3.0L Mercury Outboard, 12 Volt, 50 AMP, Internal Fan, Multi-groove serpentine pulley included, Includes wire/plug connector.Features: All alternators are engineered for performance and reliability All alternators are engineered...- $558.66
$727.68- $558.66
- Unit price
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Vendor:Balmar
Balmar Pulley Kit f/Yanmar 3JH2-TE, 3JH2-E [48-YSP-3JH-C]
- $963.00
$0.00- $963.00
- Unit price
- / per
Pulley Kit for Yanmar 3JH2-TE, 3JH2-EAltMount® Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 3JH2-TE, 3JH2-EKit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 45″ Circumference Serpentine Belts (one spare) & Mounting HardwareNote: If you specify an AT-200A Alternator, a longer belt length...- $963.00
$0.00- $963.00
- Unit price
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Vendor:ARCO Marine
ARCO Marine Zeus A8000-48V 8kW Ford Transit Alternator w/Isolated Ground K6 Pulley [4610]
- $2,994.34
$3,532.07- $2,994.34
- Unit price
- / per
Zeus A8000-48V 8kW Ford Transit Alternator with Isolated Ground & K6 PulleyARCO Zeus 48V Advantage. Better Technology = Better Performance. High Output/High Amperage Alternator: The Highest Power Output in Its Class.A8000-48V AdvantageThe ARCO Zeus A8000-48V alternator turns on at lower RPMs, runs cooler, and...- $2,994.34
$3,532.07- $2,994.34
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A220/3000W 12V HD High Output Alternator - Pad Mount [4044]
- $1,296.12
$1,629.93- $1,296.12
- Unit price
- / per
Zeus A220/3000W 12V HD High Output Alternator - Pad MountARCO Zeus Heavy Duty Alternator is engineered for maximum output and extended-duty performance in demanding marine and diesel applications. Delivering the highest power output in its class, this high-amperage alternator is built to rapidly charge large...- $1,296.12
$1,629.93- $1,296.12
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A220/3000W 12V HD High Output Alternator - J180 Mount [4043]
- $1,296.12
$1,629.93- $1,296.12
- Unit price
- / per
Zeus A220/3000W 12V HD High Output Alternator - J180 MountARCO Zeus Heavy Duty Alternator is engineered for maximum output and extended-duty performance in demanding marine and diesel applications. Delivering the highest power output in its class, this high-amperage alternator is built to rapidly charge large...- $1,296.12
$1,629.93- $1,296.12
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A115/3500W 24V HD High Output Alternator - Pad Mount [4413]
- $1,518.19
$1,909.26- $1,518.19
- Unit price
- / per
Zeus A115/3500W 24V HD High Output Alternator - Pad MountARCO Zeus Heavy Duty Alternator is engineered for maximum output and extended-duty performance in demanding marine and diesel applications. Delivering the highest power output in its class, this high-amperage alternator is built to rapidly charge large...- $1,518.19
$1,909.26- $1,518.19
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A115/3500W 24V HD Hight Output Alternator - J180 Mount [4412]
- $1,518.19
$1,909.26- $1,518.19
- Unit price
- / per
Zeus A115/3500W 24V HD Hight Output Alternator - J180 MountARCO Zeus Heavy Duty Alternator is engineered for maximum output and extended-duty performance in demanding marine and diesel applications. Delivering the highest power output in its class, this high-amperage alternator is built to rapidly charge large...- $1,518.19
$1,909.26- $1,518.19
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A8000-48V 8kW 3.15 Alternator w/Isolated Ground (Common Rail) [4602]
- $2,994.34
$3,532.07- $2,994.34
- Unit price
- / per
Zeus A8000-48V 8kW 3.15 Alternator with Isolated Ground (Common Rail)The ARCO Zeus A8000-48V alternator turns on at lower RPMs, runs cooler, and provides more power than other 48V alternators that are larger and heavier. This alternator continuously generates over 3kW (55 Amps) at 2,500...- $2,994.34
$3,532.07- $2,994.34
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A275L J180 4" Alternator w/Isolated Ground Terminal Block [4023]
- $1,531.74
$1,745.29- $1,531.74
- Unit price
- / per
Zeus A275L J180 4" Alternator with Isolated Ground & Terminal BlockThe highest power output alternator in its size/class. Features: Engineered for high energy production. Suitable for marine, RV, military, and commercial applications. Rapidly charges large battery banks. Coolest operating temperatures for increased performance. Heat shedding...- $1,531.74
$1,745.29- $1,531.74
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Zeus A225S 3.15 Alternator w/Isolated Ground Terminal Block [4011]
- $1,226.01
$1,396.54- $1,226.01
- Unit price
- / per
Zeus A225S 3.15 Alternator with Isolated Ground & Terminal BlockThe highest power output alternator in its size/class. Features: Engineered for high energy production. Suitable for marine, RV, military, and commercial applications. Rapidly charges large battery banks. Coolest operating temperatures for increased performance, running 8-20% cooler...- $1,226.01
$1,396.54- $1,226.01
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815]
- $356.14
$476.02- $356.14
- Unit price
- / per
Premium Replacement Alternator with 50mm Multi-Groove PulleyReplacement alternator that will fit Mercruiser 4.3L-6.2L, 12 Volt, 70 AMP, Internal Fan, 50-mm multi-groove serpentine pulley included.Features: All alternators are engineered for performance and reliability All alternators are engineered and manufactured with precision and quality All alternators...- $356.14
$476.02- $356.14
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Zeus Alternator Shield - 48V [AS48]
- $178.76
$185.76- $178.76
- Unit price
- / per
Zeus Alternator Shield - 48VProtect Your Alternator from Voltage Spikes & Disconnect EventsThe ARCO Zeus Alternator Shield is engineered to protect high-output alternators from damaging voltage spikes caused by sudden battery disconnect events. These events, commonly triggered by lithium battery BMS shutdowns or accidental...- $178.76
$185.76- $178.76
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Zeus Alternator Shield - 24V [AS24]
- $134.07
$160.55- $134.07
- Unit price
- / per
Zeus Alternator Shield - 24VProtect Your Alternator from Voltage Spikes & Disconnect EventsThe ARCO Zeus Alternator Shield is engineered to protect high-output alternators from damaging voltage spikes caused by sudden battery disconnect events. These events, commonly triggered by lithium battery BMS shutdowns or accidental...- $134.07
$160.55- $134.07
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Zeus Alternator Shield - 12V [AS12]
- $118.70
$139.60- $118.70
- Unit price
- / per
Zeus Alternator Shield - 12VProtect Your Alternator from Voltage Spikes & Disconnect EventsThe ARCO Zeus Alternator Shield is engineered to protect high-output alternators from damaging voltage spikes caused by sudden battery disconnect events. These events, commonly triggered by lithium battery BMS shutdowns or accidental...- $118.70
$139.60- $118.70
- Unit price
- / per
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Vendor:Balmar
Balmar Yanmar Pulley Kit f/4JH, 4JHE, -TE, -HTE, -DTE [48-YSP-4JH-F]
- $963.00
$0.00- $963.00
- Unit price
- / per
Yanmar Pulley Kit for 4JH, 4JHE, -TE, -HTE, -DTEAltMount® Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 4JH, 4JHE, -TE, -HTE, -DTEKit Includes: Three Ten-Groove (J10) Pulleys Two J10 47″ Circumference Serpentine Belts (one spare) Mounting Hardware Note: If you specify an AT-200A...- $963.00
$0.00- $963.00
- Unit price
- / per


![ARCO Marine Premium Replacement Alternator w/Multi-Groove Serpentine Pulley - 12V 65A [60060]](http://www.dbmarinesupplies.com/cdn/shop/files/98987XL_533x.jpg?v=1682839511)
![ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]](http://www.dbmarinesupplies.com/cdn/shop/files/97206XL_533x.jpg?v=1682828581)
![ARCO Marine Zeus 24V 7kW 3.15 Alternator w/Isolated Ground [4501]](http://www.dbmarinesupplies.com/cdn/shop/files/107554XL_533x.jpg?v=1738973288)
![ARCO Marine Premium Replacement Outboard Alternator w/Multi-Groove Pulley - 12V 50A [20850]](http://www.dbmarinesupplies.com/cdn/shop/files/97207XL_533x.jpg?v=1682828597)
![ARCO Marine Zeus A8000-48V 8kW Ford Transit Alternator w/Isolated Ground K6 Pulley [4610]](http://www.dbmarinesupplies.com/cdn/shop/files/114272XL_533x.jpg?v=1780637624)
![ARCO Marine Zeus A8000-48V 8kW 3.15 Alternator w/Isolated Ground (Common Rail) [4602]](http://www.dbmarinesupplies.com/cdn/shop/files/108030XL_533x.jpg?v=1741301977)
![ARCO Marine Zeus A275L J180 4" Alternator w/Isolated Ground Terminal Block [4023]](http://www.dbmarinesupplies.com/cdn/shop/files/107370XL_533x.jpg?v=1738713092)
![ARCO Marine Zeus A225S 3.15 Alternator w/Isolated Ground Terminal Block [4011]](http://www.dbmarinesupplies.com/cdn/shop/files/107516XL_533x.jpg?v=1738973210)
![ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815]](http://www.dbmarinesupplies.com/cdn/shop/files/97201XL_533x.jpg?v=1682828507)