Upgrade your vessel's charging system with this heavy-duty 51 Amp marine alternator. Specifically designed to replace original Motorola units used on a wide range of marine engines including Lehman, Westerbeke, and Crusader, this unit provides stable power delivery even in harsh saltwater environments.
RELIABILITY: Engineered with high-temp windings and corrosion-resistant components to meet or exceed OEM marine standards (SAE J1171 Certified).
Key Features
✔ Bi-Directional Rotation (Fits CW/CCW)
✔ Internal Voltage Regulator (IR)
✔ 2-Inch Single Mounting Foot (Spool)
✔ Marine SAE J1171 Ignition Protected
Technical Specs
Voltage:
12V
Amperage:
51A
Rotation:
Bi-Directional
Regulator:
Internal (IR)
Fan:
External (EF)
Compatibility / Fitment Guide
Make/System
Model/Application
Notes
Lehman Marine
Diesel Engines (Various)
Standard replacement
Westerbeke
Generator Sets / Inboards
Common on older models
Crusader / Hardin
Marine Inboards
Motorola base systems
Bayliner
Gas & Diesel Models
Check foot size (2")
OEM Cross Reference
Motorola
8MR2023K, 8MR2024K, 8MR2049K, 110-258
Lester
7497, 8803, 7477
Arco Marine
60050, 60052
API Marine
20050, 20054
J&N Electrical
400-16000, 400-16001, AMO0080
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part from 4Drive, manufactured to meet or exceed original equipment (OE) standards for marine performance.
How do I know if it is compatible?
Check your existing unit for numbers like 8MR2024K or Lester 7497. This unit uses a 2-inch mounting foot; if your original part has a 1-inch or 3-inch foot, modifications may be required.
Can this alternator rotate in both directions?
Yes, this unit is bi-directional. It is designed to function correctly with both standard (Clockwise) and reverse (Counter-Clockwise) engine rotations, common in twin-engine marine setups.
Note: Technical data provided by 4drive.co.uk. Please verify your original part number against the references above before purchasing.
