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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-$49.00 USD
Vendor:BalmarBalmar Alternator 170 Amp, 12V Single Foot Internal Regulator K6 Pulley [XT-SF-170-IR]
Regular price $539.00 USDRegular price$588.00 USD-$49.00 USD Sale price $539.00 USD -
-$58.47 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Alternator w/Multi-Groove Serpentine Pulley - 12V 65A [60060]
Regular price $241.95 USDRegular price$300.42 USD-$58.47 USD Sale price $241.95 USD -
-$54.19 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]
Regular price $224.95 USDRegular price$279.14 USD-$54.19 USD Sale price $224.95 USD -
-$54.72 USD
Vendor:ARCO MarineARCO Marine Replacement Alternator f/Mercury Engines - 135 150 HP [20851]
Regular price $261.95 USDRegular price$316.67 USD-$54.72 USD Sale price $261.95 USD -
-$99.25 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Outboard Alternator w/Multi-Groove Pulley - 12V 50A [20850]
Regular price $396.95 USDRegular price$496.20 USD-$99.25 USD Sale price $396.95 USD -
-$152.90 USD
Vendor:ARCO MarineARCO Marine Zeus A275L J180 4" Alternator w/Isolated Ground Terminal Block [4023]
Regular price $1,096.70 USDRegular price$1,249.60 USD-$152.90 USD Sale price $1,096.70 USD -
-$145.00 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 $1,220.00 USDRegular price$1,365.00 USD-$145.00 USD Sale price $1,220.00 USD -
-$143.00 USD
Vendor:BalmarBalmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-DF-250-K6]
Regular price $1,207.00 USDRegular price$1,350.00 USD-$143.00 USD Sale price $1,207.00 USD -
-$64.00 USD
Vendor:BalmarBalmar Regulator Kit f/Valeo w/MC-618 [MC-618-VL-01]
Regular price $535.00 USDRegular price$599.00 USD-$64.00 USD Sale price $535.00 USD -
-$52.13 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A [60050]
Regular price $209.95 USDRegular price$262.08 USD-$52.13 USD Sale price $209.95 USD -
-$119.00 USD
Vendor:BalmarBalmar 621 Series 120A Kit w/MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot Mounting Hardware [621-VUP-MC-120-K6]
Regular price $1,003.00 USDRegular price$1,122.00 USD-$119.00 USD Sale price $1,003.00 USD -
-$21.00 USD
Vendor:BalmarBalmar Offshore Repair Kit 60 Series 12V w/Bearings, Brushes, Regulator/Rectifier [7060]
Regular price $182.00 USDRegular price$203.00 USD-$21.00 USD Sale price $182.00 USD -
-$91.00 USD
Vendor:BalmarBalmar Alternator 120 AMP 12V 4" Dual Foot Saddle K6 Pulley w/Isolated Ground [604-120-K6]
Regular price $766.00 USDRegular price$857.00 USD-$91.00 USD Sale price $766.00 USD -
-$145.00 USD
Vendor:BalmarBalmar Alternator Vortec K6 Serpentine Pulley Regulator Temp Sensor - 170A - 12V [XT-VT-170-K6-KIT]
Regular price $1,220.00 USDRegular price$1,365.00 USD-$145.00 USD Sale price $1,220.00 USD -
-$58.68 USD
Vendor:ARCO MarineARCO Marine Premium Replacement Alternator w/Single-Groove Pulley - 12V, 70A [20810]
Regular price $226.95 USDRegular price$285.63 USD-$58.68 USD Sale price $226.95 USD -
-$85.25 USD
Vendor:ARCO MarineARCO 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