Zeus A225S J-180 3.15″ 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 coatingsRectifier located on housing exteriorDual cooling fansOEM ComponentsOptimized 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 – 12vField Type – PRotor Poles – 16Stator Size – 130mmFrame Size – SmallWeight – 12lbs/6.7kgRegulation – External OnlyOutput Voltage – 14.1v (default)Finish – (Black) Cerakote or E-coatingCut-In RPM – 1,061 Alternator RPMMaximum Alt RPM – 19,000Battery Post – M8 Thread Post, Side MountStandard Pulley – 49K6 (6-groove, 49mm)Pulley Mount – 17mm diameter shaft, 25mm long, threaded M17 x 1.5Pulley Hardware – M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)Diodes – 6 positive, 6 negative, 50A Rated, AvalancheMax Output (Cold, 9,000 RPM) – 254 AmpsSustained Cruising Output (Hot, 6,000 RPM) – 187 AmpsSustained Idle Output (Hot, 3,000 RPM) – 157 AmpsMounting Application:Replaces most small case styles using a 3.15 J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi) Most Yanmars.