Engine Parts & Service - Alternators

Premium Replacement Alternator with Single Groove Pulley - 12V 70AReplacement alternator that will fit Mercruiser, BRP-OMC, 12 Volt, 70 Amp, Self-exciting, Ignition protection screens, Internal regulator, Negative ground, 1-wire connection, 2-inch mounting foot, Single groove pulley included.Features: All alternators are engineered for performance and reliability All alternators are engineered and manufactured with precision and quality All alternators must meet or exceed OEM performance before being boxed Warranty Information:When properly installed, all ARCO products are warrantied against defects in materials and workmanship for a period of 12 months for leisure use and 90 days for commercial or racing applications. Add an extra year of warranty to your rotating electric ARCO product (Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters) when you register your product within 30 days of purchase. You can register your product by visiting arcomarine.com/product-registration Replaces:MERCURY 32701MERCURY 47456A1MERCURY 56045MERCURY 59755MERCURY 69729Sierra 18-5950This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Amperage: 70A Voltage: 12v Box Dimensions: 8"H x 8"W x 9"L WT: 12 lbs UPC: 693006001128 Quick Guide (pdf)

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Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator & Temp SensorKit Includes: a 60-100-J10 Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware60-100-J10 Alternator: 100A, 12V, Saddle Mount (Dual Foot), 3.15in, J10 AltMount Serpentine Pulley, Isolated GroundHitachi-Style Mounting; Typical for Yanmar, Westerbeke, Lehman & Perkins-Sabre EnginesReplaces: 60-YP-MC-100-SR-KITThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Brochure (pdf)

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Alternator 1-2" Single Foot J10 Serpentine Pulley - 170A - 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 alternators to ensure improved system reliability combined with increased charging power.Features: 1-2" Single Foot J10 Serpentine Pulley 170A 12V This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Voltage: 12v Amperage: 170A Box Dimensions: 9"H x 10"W x 10"L WT: 13.9 lbs UPC: 676205500838 Brochure (pdf)

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Alternator 3.15" Dual Foot Saddle K6 Serpentine Pulley - 170A - 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 alternators to ensure improved system reliability combined with increased charging power.Features: 3.15" Dual Foot Saddle K6 Serpentine Pulley 170A 12V This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Voltage: 12v Amperage: 170A Box Dimensions: 9"H x 10"W x 10"L WT: 14.5 lbs UPC: 676205500791 Brochure (pdf)

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Digital Duo Charge - 12/24VThe Digital Duo Charge (DDC-12/24) provides a “hands off” solution for charging two battery banks without the use of problematic isolators or manual battery switches. During charging the DDC-12/24 monitors voltage at the house battery. When voltage exceeds the set minimum (typically 13.2V in a 12V system and 26.4V in a 24V system) the DDC-12/24 automatically engages, providing up to 30A charge current to the starting battery. When no charge source is present, the DDC-12/24 separates the batteries so the starting battery won’t be accidentally discharged into the house battery. An optional solenoid control enables higher start battery charging output when required.Features: Multi Bank Charging The DDC is a Solid-State Battery Combiner Control Voltage and Current between House and Start Batteries Eliminates the Need for an Isolator, Relay or Manually Operated Battery Switch Used in Concert with Max Charge or ARS-5 Regulators Can also be Employed without a Balmar Regulator Works in Both 12V and 24V Applications House and Start Batteries can be different technologies Start Battery Temperature Sensing Available with the MC-TS-B Sensor Cable 4 Battery Programs Supported for the Start Battery: Standard Flooded, Deep Cycle Flooded, AGM and Gel Cell This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Owner's Manual (pdf)

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ARS Multi-Stage Regulator w/Harness - 12VHigh output alternators are an important part of your system for battery care, but they are definitely not the only part.  Without proper voltage regulation, battery charging can be a slow process, or even worse, an ideal recipe for early battery failure.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

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Zeus A8000-48V 8kW N62 Alternator with Clutch PulleyThe ARCO Zeus A8000-48V alternator turns on at lower RPMs, runs cooler, and provides more power than other 48V alternators that are larger and heavier. This alternator continuously generates over 3kW (55 Amps)at  2,500 RPM and almost 6kW (111 Amps) at 4,000 Alternator RPM. Put in real-world terms, a marine diesel engine charging at 1,200 RPM with a 3.13:1 pulley ratio is generating just over 5kW (97 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 3kW (55 Amps)!Instead of using rotors designed for 48 volts, many competitor alternators simply use their 12V rotors which is less efficient and limits output at all RPMs. In this scenario, your external smart regulator must drastically reduce field, by as much as 78%. If this is not done correctly, you run the risk of destroying the unit and damaging other components in your system. ARCO utilizes a native 48V rotor and field current. This results in our 48V alternator running cooler than competitor’s 48V 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 idle 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. Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging. SAE J1171 Certified. Proudly made in the U.S.A. Technical Specifications: Voltage - 48v 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 - 1,920 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, 80A Rated, Avalanche Max Output (Cold, 9,000 RPM) at 53.5v - 180 Amps - 9,360 Watts – 14.8 kW PTO Sustained Cruising Output (Hot, 6,000 RPM) at 53.5v - 138 Amps - 7,383 Watts – 10.5 kW PTO Sustained Idle Output (Hot, 2,500 RPM) at 53.5v - 78 Amps 4,173 Watts – 6kW PTO Max Continuous Operating Temperature - 100°C / 212°F Mounting Application:Replaces factory dual alternator on many Sprinter RVs, including Roadtrek, Thor, Winnebago, and others. For all Mercedes Sprinter applications with the N62 option. Meets current Mercedes Upfitter weight and PTO requirements. Quick Guide (pdf)Brochure (pdf)

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Zeus 24V 7kW 3.15 Alternator with Isolated Ground (Common Rail)The 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 6,000 RPM. In real-world terms, a marine diesel engine at 1,500 RPM with a 2:1 pulley ratio generates over 3kW, and a Mercedes Sprinter at 1,800 RPM with a 3.21:1 ratio generates over 6kW!The ARCO Zeus 24v 7kW alternator turns on for cruising or at mid to higher 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 idle 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. Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging. 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 - 1,962 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, 80A Rated, Avalanche Max Output (Cold, 9,000 RPM) at 27.5v - 284 Amps - 7,810 Watts – 11.2 kW PTO Sustained Cruising Output (Hot, 6,000 RPM) at 27.5v - 220 Amps - 6,050 Watts – 8.6kW PTO Sustained Idle Output (Hot, 3,000 RPM) at 27.5v - 50 Amps 1,375 Watts – 2kW PTO Max Continuous Operating Temperature - 100°C / 212°F Mounting Application:Must Be Used on Yanmar Common Rail Engines Introduced after 2013 (JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110). Quick Guide (pdf)Brochure (pdf)

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Zeus 24V 4kW Low Turn On (LTO) J180 4" 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 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. Quick Guide (pdf)Brochure (pdf)

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Zeus A225S Vortec Alternator with RegulatorThe 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. Runs 8 - 20% cooler than incumbent alternators due to: 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. Our advanced coating absorbs less heat, keeping the A225S cooler. This translates to more amperage for sustained periods. For maximum performance or lithium battery charging, use an ARCO Zeus Bluetooth alternator regulator. SAE J1171 Certified. Proudly made in the U.S.A. Technical Specifications: Voltage - 12v Field Type - P Rotor Poles - 16 Stator Size - 130mm Frame Size - Small Weight - 12lbs/6.7kg Regulation - Internal/External 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) - 254 Amps Sustained Cruising Output (Hot, 6,000 RPM) - 187 Amps Sustained Idle Output (Hot, 3,000 RPM) - 157 Amps Mounting Application:Replaces Mando type alternators using Vortec/ GM pad mounting feet (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks)

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Zeus A275L Vortec Alternator with RegulatorThe 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.  Runs 8 - 20% cooler than incumbent alternators due to: Heat shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM Components. It is 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. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods. Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance. SAE J1171 Certified. 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 Application:Replaces Mando-type alternators using Vortec/GM pad mounting feet. (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks) Quick Guide (pdf)

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Zeus A275L Vortec Alternator with 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.  Runs 8 - 20% cooler than incumbent alternators due to: Heat shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM Components. It is 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. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods. Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance. SAE J1171 Certified. 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 - External Only (These units will come with a terminal block and a P-Type harness. They will only work with an external regulator, such as an ARCO Zeus Bluetooth alternator regulator.) 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 Application:Replaces Mando-type alternators using Vortec/GM pad mounting feet. (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks)

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