Engine Parts & Service - Alternators

Zeus A225OB-12V High Output Outboard Alternator Engineered Kit

Kit includes everything needed for Verado applications: alternator, alternator positive fuse link wire, alternator ground wire, battery sense wire, and OEM replacement alternator belt.

The ARCO Zeus A225ob-12V is a 225-amp, 3,500-watt high-output outboard alternator delivering 2 to 3x faster charge times compared to OEM units. It is part of the ARCO Zeus High Energy product family, engineered for boaters who need a complete onboard power upgrade, not just a component swap.

Features:

• 225 amps and 3,500 watts of charging capability with 2 to 3x faster charge times vs OEM units
• Engineered to help recharge large lithium banks at significantly faster rates than typical OEM alternators
• Built to support stabilizers, inverters, air conditioning, refrigeration, trolling motors, water and ice makers, and premium audio
• Batteries continue charging even at low engine speeds, including idle, so power is available when and where you need it
• Enables efficient charging without a dedicated engine or generator runtime

Zeus 24V 4kW Low Turn On (LTO) J180 4" Alternator with Isolated Ground & Zeus High-Energy Alternator Regulator

Zeus 24V 4kW Low Turn On (LTO) J180 4" Alternator with Isolated Ground

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 1.4kW (51 Amps) at just under 1,500 RPM and almost 2.4kW (87 Amps) at 2,000 RPM. Put in real-world terms, a marine diesel engine idling at 750 RPM with a 2:1 pulley ratio is generating over 1.5kW (55 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 2.5kW (91 Amps)!

The ARCO Zeus 24V 4kW alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. The newest generation of 24V performance has arrived.

Competitor’s 24V alternators utilize a 12V rotor and field current, which is less efficient and limits output at all RPMs. ARCO utilizes a native 24V rotor and field current. This results in our 24V alternator running cooler than competitors’ 24V alternators, having a direct impact on the alternator's lifespan.

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
• Rectifier located on housing exterior
• Dual cooling fans
• OEM components
• Optimized for performance at cruising speeds.
• Reduces the need for a generator by creating additional power with your engine.
• Unleash peak performance with E-Coat/Cerakote, keeping the high amp alternator cooler for sustained amperage output.
• For maximum performance or lithium battery charging, use the ARCO Zeus Bluetooth Alternator Regulator.
• SAE J1171 Certified.
• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 24V
• Field Type - P
• Rotor Poles - 16
• Stator Size - 138mm
• Frame Size - Large
• Weight - 15.89lbs/7.2kg
• Regulation - External Only
• Finish - (Black) E-coating
• Cut-In RPM - 1,072 Alternator RPM
• Maximum Alt RPM - 19,000
• Battery Post - M8 Thread Post, Side Mount
• Standard Pulley - 49K6 (6-groove, 49mm)
• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
• Max Output (Cold, 9,000 RPM) at 27.5v - 144 Amps - 3,960 Watts – 5.7Kw PTO
• Sustained Cruising Output (Hot, 6,000 RPM) at 27.5v - 130 Amps - 3,575 Watts – 5.1Kw PTO
• Sustained Idle Output (Hot, 3,000 RPM) at 27.5v - 108 Amps - 2,970 Watts – 4.2kW PTO
• Max Continuous Operating Temperature - 100°C / 212°F

Mounting Application:

• Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount.

Zeus High-Energy Alternator Regulator

ARCO’s Zeus is the only high-energy external alternator regulator to feature Bluetooth and a native app (on IOS and Android) allowing for easy installation and configuration. With its intuitive interface, you can access information on your system that you never had before. This information will enable you to regulate your system and optimize your battery charge and alternator output, resulting in a safer experience while protecting your energy system investment.

Zeus is the only alternator regulator that can read 2 shunts at a time (the battery shunt and alternator shunt). This feature enables Zeus to react to inputs from the battery current/temperature and alternator current/temperature.

Through the ARCO Zeus application, you are in good hands. Your data is automatically logged and can be shared with your technician to troubleshoot your system remotely. You can even import your remote technician’s configurations. 

Zeus optimizes battery charges for 12-48 volt systems. Whether you are using Lithium (LiFePo4) batteries or lead-acid Deep Cycle batteries, Zeus has you covered with its pre-set battery libraries and configurable menus to optimize your charging profiles. Zeus manages a complex set of inputs by giving you easy-to-understand options.

Zeus also takes into consideration the power of your engine and allows you to configure the alternator’s power take-off from the engine by managing the field, or duty. An advanced feature of Zeus is that it can turn your engine into a dedicated generator with the press of a button, whereby it focuses the alternator’s performance on the creation of energy to replenish your battery bank quickly.

Consistent with Zeus’ ease of use, Zeus is the only alternator regulator on the market that comes with alternator/battery harnesses and 2 thermistor harnesses, without an additional charge, saving users money and time from sourcing harnesses.

Features:

• Secure Bluetooth connection
• Harnesses, Thermistors, and NMEA 2000 kit included
• Monitors the state of charge
• Can turn your engine into a dedicated generator with generator mode
• Pre-set battery libraries
• Data logging and sharing
• CAN bus and NMEA 2000-integrated networks
• Compatible with all voltage systems (12- 48V)
• IP66 & IP67 rated
• 2-Year warranty

Technical Specifications:

• Enclosure dimensions without antenna - 8.2" x 5.9" x 2.4" 
• Enclosure dimensions with antenna - 8.2" x 7.5" x 2.4"
• Weight - 1.7 lbs

In the Box:

• Zeus high-energy alternator regulator
• Battery wiring harness
• Alternator wiring harness
• 2 thermistors

Zeus 24V 4kW Low Turn On (LTO) J180 4" Alternator with Isolated Ground

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 1.4kW (51 Amps) at just under 1,500 RPM and almost 2.4kW (87 Amps) at 2,000 Alternator RPM. Put in real-world terms, a marine diesel engine idling at 750 RPM with a 2:1 pulley ratio is generating over 1.5kW (55 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 2.5kW (91 Amps)!

The ARCO Zeus 24v 4kW alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. The newest generation of 24V performance has arrived.

Competitor’s 24V alternators utilize a 12V rotor and field current which is less efficient and limits output at all RPMs. ARCO utilizes a native 24V rotor and field current. This results in our 24V alternator running cooler than competitor’s 24V alternators, having a direct impact on the alternator lifespan.

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
• Rectifier located on housing exterior
• Dual cooling fans
• OEM components
• Optimized for performance at cruising speeds.
• Reduces the need for a generator by creating additional power with your engine.
• Unleash peak performance with E-Coat/Cerakote, keeping the high amp alternator cooler for sustained amperage output.
• For maximum performance or lithium battery charging, use the ARCO Zeus Bluetooth Alternator Regulator.
• SAE J1171 Certified.
• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 24v
• Field Type - P
• Rotor Poles - 16
• Stator Size - 138mm
• Frame Size - Large
• Weight - 15.89lbs/7.2kg
• Regulation - External Only
• Finish - (Black) E-coating
• Cut-In RPM - 1,072 Alternator RPM
• Maximum Alt RPM - 19,000
• Battery Post - M8 Thread Post, Side Mount
• Standard Pulley - 49K6 (6-groove, 49mm)
• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
• Max Output (Cold, 9,000 RPM) at 27.5v - 144 Amps - 3,960 Watts – 5.7Kw PTO
• Sustained Cruising Output (Hot, 6,000 RPM) at 27.5v - 130 Amps - 3,575 Watts – 5.1Kw PTO
• Sustained Idle Output (Hot, 3,000 RPM) at 27.5v - 108 Amps - 2,970 Watts – 4.2kW PTO
• Max Continuous Operating Temperature - 100°C / 212°F

Mounting Application:

• Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount.

Alternator Vortec K6 Serpentine Pulley Regulator & Temp Sensor - 170A - 12V

Balmar 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 system reliability combined with increased charging power.

Features:

• Vortec K6 Serpentine Pulley Regulator & Temp Sensor
• 170A Kit
• 12V

Specifications:

• Voltage: 12v
• Amperage: 170A
• Box Dimensions: 11"H x 11"W x 14"L WT: 17.25 lbs
• UPC: 676205500883

Balmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley w/Isolated Ground [60-120-DV]

Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley with Isolated Ground

Alternator, 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 Engines

Replaces: 60-120-SR-IG

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Specifications:

• Amperage: 120A
• Voltage: 12v
• Box Dimensions: 9"H x 10"W x 10"L WT: 13.65 lbs
• UPC: 676205131025

Brochure (pdf)

Alternator 170 AMP 12V 4" Dual Foot Saddle K6 Pulley

Balmar 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 combined with increased charging power.

Features:

• 4" Dual-Foot K6 Serpentine Pulley
• 170A
• 12V
• Case Ground
• J-180 Mount; Typical for John Deere, Cummins, & Caterpillar Engines

This product may not be returned to the original point of purchase.  Please contact the manufacturer directly with any issues or concerns.

Specifications:

• Amperage: 170A
• Voltage: 12v
• Box Dimensions: 9"H x 9"W x 10"L WT: 15 lbs
• UPC: 676205503464

Alternator 1-2" Single Foot K6 Serpentine Pulley - 170A - 12V

Balmar 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 system reliability combined with increased charging power.

Features:

• 1-2" Single Foot K6 Serpentine Pulley
• 170A
• 12V

Specifications:

• Voltage: 12v
• Amperage: 170A
• Box Dimensions: 9"H x 10"W x 10"L WT: 14.45 lbs
• UPC: 676205500852

Zeus A275L J180 4" Alternator with Isolated Ground, Terminal Block & Zeus High-Energy Alternator Regulator

Zeus A275L J180 4" Alternator with Isolated Ground & Terminal Block

The 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
• Rectifier located on housing exterior
• Dual cooling fans
• OEM components
• Optimized for performance at idle speeds.
• Reduces the need for a generator by creating additional power with your engine.
• Unleash peak performance with E-Coat/Cerakote, keeping the A275L cooler for sustained amperage output.
• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
• SAE J1171 Certified.
• Models are available with internal/external voltage regulators.
• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 12V
• Field Type - P
• Rotor Poles - 16
• Stator Size - 138mm
• Frame Size - Large
• Weight - 14.9 lbs/6.7 kg
• Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.)
• Output Voltage - 14.1v (Default)
• Finish - (Black) Cerakote or E-coating
• Cut-In RPM - 1,061 Alternator RPM
• Maximum Alt RPM - 19,000
• Battery Post - M8 Thread Post, Side Mount
• Standard Pulley - 49K6 (6-groove, 49mm)
• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
• Max Output (Cold, 9,000 RPM) - 311 Amps
• Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps
• Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps
• Max Continuous Operating Temperature - 110°C / 230°F

Mounting Applications:

• Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount

Zeus High-Energy Alternator Regulator

ARCO’s Zeus is the only high-energy external alternator regulator to feature Bluetooth and a native app (on IOS and Android) allowing for easy installation and configuration. With its intuitive interface, you can access information on your system that you never had before. This information will enable you to regulate your system and optimize your battery charge and alternator output, resulting in a safer experience while protecting your energy system investment.

Zeus is the only alternator regulator that can read 2 shunts at a time (the battery shunt and alternator shunt). This feature enables Zeus to react to inputs from the battery current/temperature and alternator current/temperature.

Through the ARCO Zeus application, you are in good hands. Your data is automatically logged and can be shared with your technician to troubleshoot your system remotely. You can even import your remote technician’s configurations. 

Zeus optimizes battery charges for 12-48 volt systems. Whether you are using Lithium (LiFePo4) batteries or lead-acid Deep Cycle batteries, Zeus has you covered with its pre-set battery libraries and configurable menus to optimize your charging profiles. Zeus manages a complex set of inputs by giving you easy-to-understand options.

Zeus also takes into consideration the power of your engine and allows you to configure the alternator’s power take-off from the engine by managing the field, or duty. An advanced feature of Zeus is that it can turn your engine into a dedicated generator with the press of a button, whereby it focuses the alternator’s performance on the creation of energy to replenish your battery bank quickly.

Consistent with Zeus’ ease of use, Zeus is the only alternator regulator on the market that comes with alternator/battery harnesses and 2 thermistor harnesses, without an additional charge, saving users money and time from sourcing harnesses.

Features:

• Secure Bluetooth connection
• Harnesses, Thermistors, and NMEA 2000 kit included
• Monitors the state of charge
• Can turn your engine into a dedicated generator with generator mode
• Pre-set battery libraries
• Data logging and sharing
• CAN bus and NMEA 2000-integrated networks
• Compatible with all voltage systems (12- 48V)
• IP66 & IP67 rated
• 2-Year warranty

Technical Specifications:

• Enclosure dimensions without antenna - 8.2" x 5.9" x 2.4" 
• Enclosure dimensions with antenna - 8.2" x 7.5" x 2.4"
• Weight - 1.7 lbs

In the Box:

• Zeus high-energy alternator regulator
• Battery wiring harness
• Alternator wiring harness
• 2 thermistors