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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- Date, old to new
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Vendor:Balmar
Balmar 621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12V [621-100-SV]
- $702.99
$836.89- $702.99
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621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12VFeatures: 100A 12V Spindle Mount (Single Foot) 1-2" Single Deep Vee Pulley Isolated Ground 1″ Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2″ Delco-Style Mounting; Typical for Volvo Penta (Gas &...- $702.99
$836.89- $702.99
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Vendor:Balmar
Balmar Signal Stabilizer f/Tachometer [15-TSS]
- $86.99
$99.29- $86.99
- Unit price
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Signal Stabilizer for TachometerFor use with AT-Series Alternators when the Tachometer does not provide 3-pole alternator output recognition.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Brochure (pdf)- $86.99
$99.29- $86.99
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Vendor:Balmar
Balmar Max Charge MC-618 Regulator 12V w/Harness Multi-Stage [MC-618-H]
- $337.99
$402.69- $337.99
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Max Charge MC-618 Regulator 12V with Harness Multi-StageThe MC-618-H premium 12-volt multi-stage voltage regulator provides the ultimate in charging safety and control. Includes wiring harness. Features: Intelligent multi-stage regulation. Digital numeric LED display. Epoxy-encapsulated circuitry. For use with 12 volt systems Wiring harness included Can...- $337.99
$402.69- $337.99
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Vendor:Balmar
Balmar Alternator Protection Module APM24 - 24V [APM-24]
- $96.99
$110.29- $96.99
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Alternator Protection Module APM24 - 24VAlternators can be subjected to voltage spikes caused by lithium battery shutdowns, intermittent connections, and other over-voltage events. Balmar has introduced a robust Alternator Protection Module which helps to protect the alternator’s diodes and internal voltage regulator against spikes...- $96.99
$110.29- $96.99
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Vendor:Balmar
Balmar Alternator Protection Module APM12 - 12V [APM-12]
- $86.99
$99.29- $86.99
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Alternator Protection Module APM12 - 12VAlternators can be subjected to voltage spikes caused by lithium battery shutdowns, intermittent connections, and other over-voltage events. Balmar has introduced a robust Alternator Protection Module which helps to protect the alternator’s diodes and internal voltage regulator against spikes...- $86.99
$99.29- $86.99
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Vendor:Balmar
Balmar Offshore Repair Kit 60 Series 12V w/Bearings, Brushes, Regulator/Rectifier [7060]
- $182.00
$203.00- $182.00
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Offshore Repair Kit 60 Series 12V with Bearings, Brushes, Regulator/RectifierOffshore Repair Kit, 60 Series Alternators, 12VKit Includes: Regulator Brush Holder Assembly Rear Bearing Regulator Washer Rectifier Assembly Rectifier Gasket Front Bearing Instruction Sheet This product may not be returned to the original point of...- $182.00
$203.00- $182.00
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Vendor:Balmar
Balmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley w/Isolated Ground [60-120-DV]
- $759.99
$904.69- $759.99
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Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley with Isolated GroundAlternator, 60 Series, 120A, 12V, Saddle Mount (Dual Foot), 3.15in, Dual Deep Vee Pulley, Isolated Ground Hitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre EnginesReplaces: 60-120-SR-IGThis product may not be returned...- $759.99
$904.69- $759.99
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Vendor:Balmar
Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount K6 Pulley w/Isolated Ground [621-100-K6]
- $702.99
$836.89- $702.99
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Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount K6 Pulley with Isolated GroundAlternator, 621 Series, 100A, 12V, Spindle Mount (Single Foot), 1-2in, K6 Serpentine Pulley, Isolated Ground 1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2" Delco-Style Mounting; Typical for...- $702.99
$836.89- $702.99
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Vendor:Balmar
Balmar Alternator 170 AMP 12V 4" Dual Foot Saddle K6 Pulley [XT-DF4-170-K6]
- $961.99
$1,143.99- $961.99
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Alternator 170 AMP 12V 4" Dual Foot Saddle K6 PulleyBalmar offers a wide range of alternator power upgrades designed specifically for marine industry applications. They install high-reliability bearings, robust rectifier diodes, and improved heat-sinking capabilities on all their alternators to ensure improved system reliability...- $961.99
$1,143.99- $961.99
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Vendor:Balmar
Balmar Temperature Sensor Alternator - 80" Length [MC-TS-A80]
- $43.99
$50.79- $43.99
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Temperature Sensor Alternator - 80" LengthIntended for longer runs when the standard 54" Alternator Temp Sensor (PN: MC-TS-A) is insufficient.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.- $43.99
$50.79- $43.99
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Vendor:Balmar
Balmar Alternator 1-2" Single Foot K6 Serpentine Pulley - 170A - 12V [XT-SF-170-K6]
- $961.99
$1,143.99- $961.99
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Alternator 1-2" Single Foot K6 Serpentine Pulley - 170A - 12VBalmar offers a wide range of alternator power upgrades designed specifically for marine industry applications. Balmar installs high reliability bearings, robust rectifier diodes and improved heat-sinking capabilities on all our alternators to ensure improved...- $961.99
$1,143.99- $961.99
- Unit price
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Vendor:Balmar
Balmar Alternator 1-2" Single Foot J10 Serpentine Pulley - 170A - 12V [XT-SF-170-J10]
- $961.99
$1,143.99- $961.99
- Unit price
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Alternator 1-2" Single Foot J10 Serpentine Pulley - 170A - 12VBalmar offers a wide range of alternator power upgrades designed specifically for marine industry applications. Balmar installs high reliability bearings, robust rectifier diodes and improved heat-sinking capabilities on all our alternators to ensure improved...- $961.99
$1,143.99- $961.99
- Unit price
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Vendor:Balmar
Balmar Temp Sensor Alternator - 54" [MC-TS-A]
- $41.99
$47.49- $41.99
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Temp Sensor Alternator - 54"Temperature Sensor, Alternator - 54" LengthThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.- $41.99
$47.49- $41.99
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]
- $230.99
$298.68- $230.99
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Premium Replacement Alternator with Multi-Groove Pulley - 12V 55AReplacement alternator that will fit late model Mercruiser, 12 Volt, 55 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 manufactured with...- $230.99
$298.68- $230.99
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A [60050]
- $210.99
$275.18- $210.99
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Premium Replacement Alternator with Single Groove Pulley - 12V, 55APremium replacement alternator that will fit late model Mercruiser, 12 Volt, 55 Amp, Internal regulator. 2-inch mounting foot. Single groove pulley included.Features: All alternators are engineered for performance and reliability All alternators are engineered and...- $210.99
$275.18- $210.99
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Vendor:Balmar
Balmar Pulley Kit f/Yanmar 3JH5, 3JH4-E, 4JH4-E, 4JH5, 4JH5-E [48-YSP-3JH-A]
- $689.49
$0.00- $689.49
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Pulley Kit for Yanmar 3JH5, 3JH4-E, 4JH4-E, 4JH5, 4JH5-EAltMount® Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 3JH5, 3JH4-E, 4JH4-E, 4JH5Kit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 44.5″ Circumference Serpentine Belts (one spare) & Mounting HardwareNote: If you specify an AT-200A...- $689.49
$0.00- $689.49
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Vendor:Balmar
Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-170-K6-KIT]
- $1,252.99
$1,490.69- $1,252.99
- Unit price
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Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator & Temp SensorKit Includes: XT-DF-170-K6 Alternator, MC-618 Regulator, Temperature Sensors & Mounting HardwareXT Series Alternator: 170A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Case GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke,...- $1,252.99
$1,490.69- $1,252.99
- Unit price
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Vendor:Balmar
Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle J10 Pulley [XT-CR-170-J10]
- $961.99
$1,143.99- $961.99
- Unit price
- / per
Alternator 170 AMP 12V 3.15" Dual Foot Saddle J10 PulleyAlternator, XT Series, 170A, 12V, Saddle Mount (Dual Foot), 3.15in, J10 AltMount Serpentine Pulley, Case GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre EnginesReplaces: AT-DF-165-12-IG, AT-DF-165-J10This product may not be returned to the original...- $961.99
$1,143.99- $961.99
- Unit price
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Vendor:Balmar
Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle K6 Pulley w/Isolated Ground [60-100-K6]
- $702.99
$836.89- $702.99
- Unit price
- / per
Alternator 100 AMP 12V 3.15" Dual Foot Saddle K6 Pulley with Isolated GroundAlternator, 60 Series, 100A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Isolated Ground Hitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre EnginesReplaces: 60-100-SR-IGThis product may not be returned to...- $702.99
$836.89- $702.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-CR-170-J10-KIT]
- $1,252.99
$1,490.69- $1,252.99
- Unit price
- / per
Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator & Temp SensorKit Includes: XT-DF-170-J10 Alternator, MC-618 Regulator, Temperature Sensors & Mounting HardwareXT Series Alternator: 170A, 12V, Saddle Mount (Dual Foot), 3.15in, J10 AltMount Serpentine Pulley, Case GroundHitachi-Style Mounting; Typical for Yanmar,...- $1,252.99
$1,490.69- $1,252.99
- Unit price
- / per


![ARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]](http://www.dbmarinesupplies.com/cdn/shop/files/97209XL_533x.jpg?v=1682828626)
![ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A [60050]](http://www.dbmarinesupplies.com/cdn/shop/files/97202XL_533x.jpg?v=1682828521)