Keep your boat's electrical system running smoothly with our collection of marine-grade engine alternators. Built to withstand the harsh marine environment, these high-performance alternators provide dependable charging power for your batteries and onboard electronics.
Whether you're replacing a worn-out unit or upgrading for higher output, our alternators are designed for durability, corrosion resistance, and consistent performance under load. Ideal for powering everything from navigation systems to fish finders and lighting, they help ensure you're never left without power on the water.
Shop now and choose from a range of 12V and 24V boat engine alternators compatible with leading marine engine brands—because when you're offshore, reliable power isn't optional, it's essential.
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Vendor:ARCO Marine
ARCO Marine Premium Replacement Outboard Alternator - Verado 12V 70A [20860]
Regular price $337.95 USDRegular price$423.20 USD-$85.25 USD Sale price $337.95 USD -
Vendor:ARCO Marine
ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]
Regular price $203.95 USDRegular price$257.08 USD-$53.13 USD Sale price $203.95 USD -
Vendor:ARCO Marine
ARCO Marine Premium Replacement Inboard Alternator w/Single Groove Pulley - 12V 55A [60125]
Regular price $237.95 USDRegular price$296.45 USD-$58.50 USD Sale price $237.95 USD -
Vendor:ARCO Marine
ARCO Marine Zeus 24V 7kW 3.15 Alternator w/Isolated Ground [4501]
Regular price $1,427.80 USDRegular price$1,648.90 USD-$221.10 USD Sale price $1,427.80 USD -
Vendor:Balmar
Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount K6 Pulley Regulator Temp Sensor [621-VUP-MC-100-K6]
Regular price $925.00 USDRegular price$1,035.00 USD-$110.00 USD Sale price $925.00 USD -
Vendor:Balmar
Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-DF4-170-K6-KIT]
Regular price $1,220.00 USDRegular price$1,365.00 USD-$145.00 USD Sale price $1,220.00 USD -
Vendor:Balmar
Balmar Alternator 120 AMP Kit 120V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [60-YP-MC-120-J10]
Regular price $1,003.00 USDRegular price$1,122.00 USD-$119.00 USD Sale price $1,003.00 USD -
Vendor:Balmar
Balmar Alternator 3.15" Dual Foot Saddle J10 Serpentine Pulley - 170A - 12V [XT-DF-170-J10]
Regular price $984.00 USDRegular price$1,100.00 USD-$116.00 USD Sale price $984.00 USD -
Vendor:Balmar
Balmar Alternator 1-2" Single Foot K6 Serpentine Pulley Regulator Temp Sensor - 170A Kit - 12V [XT-SF-170-K6-KIT]
Regular price $1,220.00 USDRegular price$1,365.00 USD-$145.00 USD Sale price $1,220.00 USD -
Vendor:Balmar
Balmar Signal Stabilizer f/Tachometer [15-TSS]
Regular price $80.99 USDRegular price$89.99 USD-$9.00 USD Sale price $80.99 USD -
Vendor:Balmar
Balmar Pulley Kit f/Westerbeke 44A, 44B, 44C [48-WSP-44A]
Regular price $433.95 USDRegular price$495.00 USD-$61.05 USD Sale price $433.95 USD -
Vendor:Balmar
Balmar Belt Buddy w/Universal Offset Adjustment Arm (UAA2) [UBB2]
Regular price $89.99 USDRegular price$99.99 USD-$10.00 USD Sale price $89.99 USD -
Vendor:Balmar
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-120-DV]
Regular price $766.00 USDRegular price$857.00 USD-$91.00 USD Sale price $766.00 USD -
Vendor:Balmar
Balmar Universal Adjustment Arm - Offset [UAA2]
Regular price $52.99 USDRegular price$58.99 USD-$6.00 USD Sale price $52.99 USD -
Vendor:Balmar
Balmar 621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12V [621-100-SV]
Regular price $688.00 USDRegular price$770.00 USD-$82.00 USD Sale price $688.00 USD -
Vendor:Balmar
Balmar Universal Adjustment Arm [UAA]
Regular price $34.99 USDRegular price$38.99 USD-$4.00 USD Sale price $34.99 USD