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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Sort by:
- Featured
- Most relevant
- Best selling
- Alphabetically, A-Z
- Alphabetically, Z-A
- Price, low to high
- Price, high to low
- Date, old to new
- Date, new to old
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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
- Unit price
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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
- Unit price
- / per
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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
- Unit price
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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
- Unit price
- / per
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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
- Unit price
- / per
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:ARCO Marine
ARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]
- $230.99
$298.68- $230.99
- Unit price
- / per
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
- Unit price
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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
- Unit price
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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
- Unit price
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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
- / per
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 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 100 AMP Kit 12V 1-2" Single Foot Spindle Mount K6 Pulley Regulator Temp Sensor [621-VUP-MC-100-K6]
- $944.99
$1,124.89- $944.99
- Unit price
- / per
Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount K6 Pulley Regulator & Temp SensorKit Includes: 621-100-K6 Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware621-100-K6 Alternator: 100A, 12V, Spindle Mount (Single Foot), 1-2in, K6 Serpentine Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for Westerbeke, Lehman,...- $944.99
$1,124.89- $944.99
- Unit price
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Vendor:Balmar
Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-DF4-170-K6-KIT]
- $1,252.99
$1,490.69- $1,252.99
- Unit price
- / per
170 AMP Alternator Kit - 12V 4" Dual Foot Saddle Mount with K6 Pulley, Regulator & Temp SensorBalmar 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...- $1,252.99
$1,490.69- $1,252.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator 120 AMP Kit 120V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [60-YP-MC-120-J10]
- $1,023.99
$1,219.39- $1,023.99
- Unit price
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Alternator 120 AMP Kit 120V 3.15" Dual Foot Saddle J10 Pulley Regulator & Temp SensorKit Includes: a 60-120-J10 Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware60-120-J10 Alternator: 120A, 12V, Saddle Mount (Dual Foot), 3.15in, J10 AltMount Serpentine Pulley, Isolated GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke,...- $1,023.99
$1,219.39- $1,023.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley - 170A - 12V [XT-DF-170-J10]
- $961.99
$1,143.99- $961.99
- Unit price
- / per
Alternator 3.15" Dual Foot Saddle 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...- $961.99
$1,143.99- $961.99
- Unit price
- / per
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Vendor:ARCO Marine
ARCO Marine Replacement Alternator f/Mercury Engines - 135 150 HP [20851]
- $263.99
$332.51- $263.99
- Unit price
- / per
Replacement Alternator for Mercury Engines - 135 & 150 HPReplacement alternator that will fit Mercury Outboard Engines 135 HP - 150 HP, 12 Volt, 55 AMP, 4 grooves, pulley included. Features: All alternators are engineered for performance and reliability. All alternators are engineered and manufactured with...- $263.99
$332.51- $263.99
- Unit price
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Vendor:Balmar
Balmar Pulley Kit f/Volvo D2-55, A, B, C, D, E, F [48-VSP-D2-A]
- $689.49
$0.00- $689.49
- Unit price
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Pulley Kit for Volvo D2-55, A, B, C, D, E, FAltMount® Serpentine Pulley Conversion Kit for Volvo Penta Diesel EnginesVolvo Penta Engines Covered: D2-55A, B, C, D, E, FKit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 44″ Circumference Serpentine Belts (one spare) & Mounting...- $689.49
$0.00- $689.49
- Unit price
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Vendor:Balmar
Balmar Pulley Kit f/Yanmar 4JH3-TE, 4JH3-HTE [48-YSP-4JH-D]
- $689.49
$0.00- $689.49
- Unit price
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Pulley Kit for Yanmar 4JH3-TE, 4JH3-HTEAltMount®Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 4JH3, -TE, -THEKit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 48″ Circumference Serpentine Belts (one spare) & Mounting HardwareNote: If you specify an AT-200A Alternator, a longer belt length...- $689.49
$0.00- $689.49
- Unit price
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Vendor:Balmar
Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-100-DV]
- $702.99
$836.89- $702.99
- Unit price
- / per
Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley with Isolated GroundAlternator, 621 Series, 100A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee Pulley, Isolated Ground 1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2" Delco-Style Mounting;...- $702.99
$836.89- $702.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-100-DV]
- $944.99
$1,124.89- $944.99
- Unit price
- / per
Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator & Temp SensorKIt Includes: 621-100-DV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware621-100-DV Alternator: 100A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for...- $944.99
$1,124.89- $944.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator Protection Module - 48V [APM-48]
- $144.99
$164.39- $144.99
- Unit price
- / per
Alternator Protection Module - 48VThe Balmar APM provides best-in-class surge protection using the latest technology developed for the automotive industry. Protect Alternators From Damaging Effects: Battery switch disconnects Lithium battery BMS disconnects Surges from solenoids, combiners, starters, and other motors. The Balmar APM excels in...- $144.99
$164.39- $144.99
- Unit price
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Vendor:Balmar
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-120-DV]
- $759.99
$904.69- $759.99
- Unit price
- / per
Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley with Isolated GroundAlternator, 621 Series, 120A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee Pulley, Isolated Ground 1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2" Delco-Style Mounting;...- $759.99
$904.69- $759.99
- Unit price
- / per
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Vendor:Balmar
Balmar Regulator Kit f/Valeo w/MC-618 [MC-618-VL-01]
- $551.99
$657.29- $551.99
- Unit price
- / per
Regulator Kit for Valeo with MC-618Balmar's MC-618 Regulator communicates with the SG200 Battery Monitor to provide information to the SG200 Color Display and Smartphone App. Now you can see how the MC-618 Regulator is directing your onboard charging activity from either the SG200 2"...- $551.99
$657.29- $551.99
- Unit price
- / per
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Vendor:Balmar
Balmar Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley Regulator Temp Sensor - 170A Kit - 12V [XT-DF-170-J10-KIT]
- $1,252.99
$1,490.69- $1,252.99
- Unit price
- / per
Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley Regulator & Temp Sensor - 170A Kit - 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...- $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)