Welcome to myboatingsupply.com We are happy to serve you!

All the Boating Supplies you'll ever need

Our Inventory is updated every other day!

Special offer - get $50 off on orders over $500

2025JUNE
  • Shop below MSRP

  • Fast shipping

  • Call us with Questions

    888-999-0313

  • Hassle-free returns

ARCO Marine  |  SKU: YBS-107516

ARCO Marine Zeus A225S 3.15 Alternator w/Isolated Ground Terminal Block [4011]

$877.80 $999.90
Shipping calculated at checkout.


Care information

Display general product information or specific product information using metafields.

Delivery and Shipping

Add some general information about your delivery and shipping policies.

Add a stand out message for your customers

Zeus A225S 3.15 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, running 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 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 an internal/external voltage regulator.
  • Proudly made in the U.S.A.

Technical Specifications:

  • Voltage - 12v
  • Field Type - P
  • Rotor Poles - 16
  • Stator Size - 130mm
  • Frame Size - Small
  • Weight - 12 lbs/5.4 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) - 254 Amps
  • Sustained Cruising Output (Hot, 6,000 RPM) - 187 Amps
  • Sustained Idle Output (Hot, 3,000 RPM) - 157 Amps
  • Max Continuous Operating Temperature - 110°C / 230°F

Mounting Application:

  • Replaces most small case styles using a 3.15" saddle style mount (e.g., Hitachi, Lucas, Mitsubishi). Most Yanmars. Requires Standard single "V" belt upgrading to a Serpentine System

Quick Guide (pdf)
Brochure (pdf)

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Product features

Use this section to highlight specific product features to your customers.

ARCO Marine Zeus A225S 3.15 Alternator w/Isolated Ground  Terminal Block [4011]

Product comparison grid

Add content here to explain a bit about the range of products on offer and which ones may be most suitable for your customers.

A table comparing the facets of 4 products
Facet
Product title
View details
Product title
View details
Product title
View details
Product title
View details
By
ByProduct vendorProduct vendorProduct vendorProduct vendor
Price
Price
$99.99
$99.99
$99.99
$99.99
Description
DescriptionA description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.