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:BalmarBalmar Pulley Kit f/Yanmar 4JH2-TE, 4JH2-HTE, 4JH2-DTE 4JH2-UTE [48-YSP-4JH-E]
Regular price $689.49 USDRegular price$0.00 USDSale price $689.49 USD -
-$150.44 USD
Vendor:BalmarBalmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [60-YP-MC-120-K6]
Regular price $1,068.95 USDRegular price$1,219.39 USD-$150.44 USD Sale price $1,068.95 USD -
-$152.90 USD
Vendor:ARCO MarineARCO Marine Zeus A275L 3.15 Alternator w/Isolated Ground Terminal Block [4019]
Regular price $1,096.70 USDRegular price$1,249.60 USD-$152.90 USD Sale price $1,096.70 USD -
-$137.50 USD
Vendor:ARCO MarineARCO Marine Zeus A275L 3.15 Alternator w/Case Ground (Common Rail) Terminal Block [4020]
Regular price $986.70 USDRegular price$1,124.20 USD-$137.50 USD Sale price $986.70 USD -
-$216.74 USD
Vendor:BalmarBalmar Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF4-250-DV-KIT]
Regular price $1,546.95 USDRegular price$1,763.69 USD-$216.74 USD Sale price $1,546.95 USD -
-$58.80 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Universal Alternator w/Single Groove Pulley - 12V 55A [60075]
Regular price $239.95 USDRegular price$298.75 USD-$58.80 USD Sale price $239.95 USD -
-$221.10 USD
Vendor:ARCO MarineARCO Marine Zeus 24V 7kW J180 4" Alternator w/Isolated Ground [4503]
Regular price $1,427.80 USDRegular price$1,648.90 USD-$221.10 USD Sale price $1,427.80 USD -
-$103.94 USD
Vendor:BalmarBalmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle Pulley w/Isolated Ground [60-100-DV]
Regular price $732.95 USDRegular price$836.89 USD-$103.94 USD Sale price $732.95 USD -
-$111.74 USD
Vendor:BalmarBalmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley w/Isolated Ground [60-120-DV]
Regular price $792.95 USDRegular price$904.69 USD-$111.74 USD Sale price $792.95 USD -
-$150.44 USD
Vendor:BalmarBalmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-120-DV]
Regular price $1,068.95 USDRegular price$1,219.39 USD-$150.44 USD Sale price $1,068.95 USD -
Vendor:BalmarBalmar Pulley Kit Yanmar f/3YM30 [48-YSP-3YM-B]
Regular price $689.49 USDRegular price$0.00 USDSale price $689.49 USD -
-$216.74 USD
Vendor:BalmarBalmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-DF-250-J10-KIT]
Regular price $1,546.95 USDRegular price$1,763.69 USD-$216.74 USD Sale price $1,546.95 USD -
-$103.94 USD
Vendor:BalmarBalmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount K6 Pulley w/Isolated Ground [621-100-K6]
Regular price $732.95 USDRegular price$836.89 USD-$103.94 USD Sale price $732.95 USD -
-$94.73 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]
Regular price $203.95 USDRegular price$298.68 USD-$94.73 USD Sale price $203.95 USD -
-$57.56 USD
Vendor:ARCO MarineARCO Marine Replacement Alternator f/Mercury Engines - 135 150 HP [20851]
Regular price $274.95 USDRegular price$332.51 USD-$57.56 USD Sale price $274.95 USD -
-$183.74 USD
Vendor:BalmarBalmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-CR-170-J10-KIT]
Regular price $1,306.95 USDRegular price$1,490.69 USD-$183.74 USD Sale price $1,306.95 USD