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.
- 10
- 15
- 20
- 25
- 30
- 50
- 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
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
-
Vendor:ARCO Marine
ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 1"-2" Single Foot Alternator w/Isolated Ground [4405]
- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
Zeus 24V 4kW Low Turn On (LTO) 1"-2" Single Foot Alternator with Isolated GroundThe ARCO Zeus 24v 4kW LTO alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. This alternator continuously generates over...- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-250-K6-KIT]
- $2,069.69
$2,463.10- $2,069.69
- Unit price
- / per
Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator & Temp SensorKit Includes: XT-CR-250-K6 Alternator, MC-618 Regulator, Temperature Sensors & Mounting HardwareXT Series Alternator: 250A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Case Ground4" J-180-Style Mounting; Typical for Caterpillar,...- $2,069.69
$2,463.10- $2,069.69
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator w/Isolated Ground (Common Rail) [4402]
- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator with Isolated Ground (Common Rail)The ARCO Zeus 24v 4kW LTO alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. This alternator continuously generates over...- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 1-2" Single Foot Dual V Pulley Regulator Temp Sensor - 170A Kit - 12V [XT-SF-170-DV-KIT]
- $1,749.87
$2,081.84- $1,749.87
- Unit price
- / per
Alternator 1-2" Single Foot Dual V 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 all our...- $1,749.87
$2,081.84- $1,749.87
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/Single-Groove Pulley - 12V, 70A [20810]
- $318.40
$418.84- $318.40
- Unit price
- / per
Premium Replacement Alternator with Single-Groove Pulley - 12V, 70AReplacement alternator that will fit Mercruiser 3.0L, 1999-Up, 12 Volt, 70 AMP, Internal Fan, Single groove pulley included. Features: All alternators are engineered for performance and reliability All alternators are engineered and manufactured with precision and quality...- $318.40
$418.84- $318.40
- Unit price
- / per
-
Vendor:Balmar
Balmar Pulley Kit, Yanmar 4JH4-HTE-TE-DTE [48-YSP-4JH-B]
- $962.91
$0.00- $962.91
- Unit price
- / per
Pulley Kit, Yanmar 4JH4-HTE-TE-DTEThe AltMount® Serpentine Pulley Conversion Kit provides an easily installed solution to provide greater load transfer and reduce engine noise and vibration. While the installation process for this kit is moderately simple, Balmar strongly recommends reading and following the installation instructions...- $962.91
$0.00- $962.91
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 120 Amp 12V 1-2" Single Foot Single K6 Pulley w/Isolated Grounding [621-120-K6]
- $1,061.37
$1,263.45- $1,061.37
- Unit price
- / per
Alternator 120 Amp 12V 1-2" Single Foot Single K6 Pulley with Isolated GroundingAlternator, 621 Series, 120A, 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 Volvo...- $1,061.37
$1,263.45- $1,061.37
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Zeus 24V 4kW Low Turn On (LTO) Vortec Alternator w/Isolated Ground [4406]
- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
Zeus 24V 4kW Low Turn On (LTO) Vortec Alternator with Isolated GroundThe ARCO Zeus 24v 4kW LTO alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. This alternator continuously generates over 1.4kW (51...- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Dual Pulley Regulator Temp Sensor [60-YP-MC-100-DV]
- $1,319.73
$1,570.98- $1,319.73
- Unit price
- / per
Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Dual Pulley Regulator & Temp SensorKit Includes: a 60-100-DV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware60-100-DV Alternator: 100A, 12V, Saddle Mount (Dual Foot), 3.15in, Dual Deep Vee Pulley, Isolated GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke,...- $1,319.73
$1,570.98- $1,319.73
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Premium Replacement Outboard Alternator - Verado 12V 70A [20860]
- $479.01
$626.48- $479.01
- Unit price
- / per
Premium Replacement Outboard Alternator - Verado 12V 70AReplacement alternator that will fit all Mercury Verado Outboards, 12 Volt, 70 AMP, internal fan, multi-groove serpentine pulley included.Features: All alternators are engineered for performance and reliability All alternators are engineered and manufactured with precision and quality...- $479.01
$626.48- $479.01
- Unit price
- / per
-
Vendor:Balmar
Balmar Pulley Kit f/Yanmar 4JH2-TE, 4JH2-HTE, 4JH2-DTE 4JH2-UTE [48-YSP-4JH-E]
- $962.91
$0.00- $962.91
- Unit price
- / per
Pulley Kit for Yanmar 4JH2-TE, 4JH2-HTE, 4JH2-DTE 4JH2-UTEAltMount®Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 4JH2-TE -HTE -DTE -UTEKit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 47″ Circumference Serpentine Belts (one spare) & Mounting HardwareNote: If you specify an AT-200A Alternator, a...- $962.91
$0.00- $962.91
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [60-YP-MC-120-K6]
- $1,430.06
$1,702.95- $1,430.06
- Unit price
- / per
Alternator 120 AMP 12V 3.15" Dual Foot Saddle K6 Pulley Regulator & Temp SensorKit Includes: a 60-120-K6 Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware60-120-DV Alternator: 120A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Isolated GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman &...- $1,430.06
$1,702.95- $1,430.06
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Zeus A275L 3.15 Alternator w/Case Ground (Common Rail) Terminal Block [4020]
- $1,377.98
$1,570.01- $1,377.98
- Unit price
- / per
Zeus A275L 3.15 Alternator with Case Ground (Common Rail) & 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...- $1,377.98
$1,570.01- $1,377.98
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF4-250-DV-KIT]
- $2,069.69
$2,463.10- $2,069.69
- Unit price
- / per
Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley Regulator & Temp SensorKit Includes: XT-DF4-250-DV Alternator, MC-618 Regulator, Temperature Sensors & Mounting HardwareXT Series Alternator: 250A, 12V, Saddle Mount (Dual Foot), 4in, Deep Dual Vee Pulley, Case Ground4" J-180-Style Mounting; Typical...- $2,069.69
$2,463.10- $2,069.69
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Zeus A275L 3.15 Alternator w/Isolated Ground Terminal Block [4019]
- $1,531.61
$1,745.14- $1,531.61
- Unit price
- / per
Zeus A275L 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. Heat shedding coatings...- $1,531.61
$1,745.14- $1,531.61
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Premium Replacement Universal Alternator w/Single Groove Pulley - 12V 55A [60075]
- $321.19
$417.22- $321.19
- Unit price
- / per
Premium Replacement Universal Alternator with Single Groove Pulley - 12V 55AReplacement alternator that will fit Yamaha, Marine Power, Crusader, Replaces Motorola, 12 Volt, 55 Amp, Internal regulator Includes: Tachometer terminal, indicator light terminal, remote battery sensing terminal, excite terminal, 1-inch mounting foot with 3-ear...- $321.19
$417.22- $321.19
- Unit price
- / per
-
Vendor:ARCO Marine
ARCO Marine Zeus 24V 7kW J180 4" Alternator w/Isolated Ground [4503]
- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
Zeus 24V 7kW J180 4" 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...- $1,994.01
$2,302.79- $1,994.01
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle Pulley w/Isolated Ground [60-100-DV]
- $981.77
$1,168.77- $981.77
- Unit price
- / per
Alternator 100 AMP 12V 3.15" Dual Foot Saddle Pulley with Isolated GroundAlternator, 60 Series, 100A, 12V, Saddle Mount (Dual Foot), 3.15in, Dual Deep Vee Pulley, Isolated Ground Hitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre EnginesReplaces: 60-100-SR-IGThis product may not be returned to...- $981.77
$1,168.77- $981.77
- Unit price
- / per
-
Vendor:Balmar
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-120-DV]
- $1,430.06
$1,702.95- $1,430.06
- Unit price
- / per
Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator & Temp SensorKit Includes: 621-120-DV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware621-120-DV Alternator: 120A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for Westerbeke,...- $1,430.06
$1,702.95- $1,430.06
- Unit price
- / per
-
Vendor:Balmar
Balmar Pulley Kit Yanmar f/3YM30 [48-YSP-3YM-B]
- $962.91
$0.00- $962.91
- Unit price
- / per
Pulley Kit Yanmar for 3YM30AltMount®Serpentine Pulley Conversion Kit for Yanmar Diesel EnginesYanmar Engines Covered: 3YM30Kit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 39″ Circumference Serpentine Belts (one spare) & Mounting HardwareNote: If you specify an AT-200A Alternator, a longer belt length may be required.This...- $962.91
$0.00- $962.91
- Unit price
- / per


![ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 1"-2" Single Foot Alternator w/Isolated Ground [4405]](http://www.dbmarinesupplies.com/cdn/shop/files/107552XL_533x.jpg?v=1738973273)
![ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator w/Isolated Ground (Common Rail) [4402]](http://www.dbmarinesupplies.com/cdn/shop/files/107549XL_533x.jpg?v=1738973252)
![ARCO Marine Premium Replacement Alternator w/Single-Groove Pulley - 12V, 70A [20810]](http://www.dbmarinesupplies.com/cdn/shop/files/98997XL_533x.jpg?v=1682839652)
![ARCO Marine Zeus 24V 4kW Low Turn On (LTO) Vortec Alternator w/Isolated Ground [4406]](http://www.dbmarinesupplies.com/cdn/shop/files/107553XL_533x.jpg?v=1738973280)
![ARCO Marine Premium Replacement Outboard Alternator - Verado 12V 70A [20860]](http://www.dbmarinesupplies.com/cdn/shop/files/97210XL_533x.jpg?v=1682828640)
![ARCO Marine Zeus A275L 3.15 Alternator w/Case Ground (Common Rail) Terminal Block [4020]](http://www.dbmarinesupplies.com/cdn/shop/files/107507XL_533x.jpg?v=1738713107)
![ARCO Marine Zeus A275L 3.15 Alternator w/Isolated Ground Terminal Block [4019]](http://www.dbmarinesupplies.com/cdn/shop/files/107504XL_533x.jpg?v=1738713099)
![ARCO Marine Premium Replacement Universal Alternator w/Single Groove Pulley - 12V 55A [60075]](http://www.dbmarinesupplies.com/cdn/shop/files/97208XL_533x.jpg?v=1682828612)
![ARCO Marine Zeus 24V 7kW J180 4" Alternator w/Isolated Ground [4503]](http://www.dbmarinesupplies.com/cdn/shop/files/107556XL_533x.jpg?v=1738973302)