This 12V 75-Amp Alternator is a high-performance replacement specifically engineered for Vetus marine diesel engines. Designed to withstand the harsh conditions of marine environments, this unit features a corrosion-resistant finish and high-temperature internal components to ensure reliable battery charging and electrical system support.
UPGRADE PERFORMANCE: This 75A unit serves as a powerful direct-fit upgrade for older 40A and 50A alternators (STM3931/STM1655), providing faster charging at lower RPMs.
Key Features
✔ Direct Fit: No modifications required for Vetus M-Series.
✔ Marine-Ready: Sealed bearings and internal protection.
✔ Tacho Terminal: Includes "W" terminal for tachometer connection.
✔ High Output: 75 Amps for modern marine electronics.
Technical Specs
Voltage
12V
Amperage
75A
Rotation
CW (Clockwise)
Pulley Type
1-Groove (V-Belt)
Regulator
Internal (IR)
Fan Type
Internal (IF)
Compatibility / Fitment Guide
Engine Model
Application
Notes
Vetus M2.C5
Marine Diesel
1998-Onwards
Vetus M2.D5
Marine Diesel
1998-Onwards
Vetus M3.09
Marine Diesel
All Models
Mitsubishi L2A / L2E
Industrial/Marine
Base Engine Fitment
OEM Cross Reference
Vetus
STM3931, STM1655, STM1243
Mitsubishi
A7TA0171, A7TA0171B, A1T25271
Wilson
90-27-3278
Lester
20563
Questions & Answers
Is this a genuine original part?
This is a premium quality 4Drive aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
Will this work if my original was only 40 Amps?
Yes. This 75A unit is a common upgrade for the original 40A and 50A alternators used on Vetus engines. It provides better charging capacity without damaging your battery or electrical system.
Does it include the pulley?
Yes, this alternator comes complete with a single-groove V-belt pulley installed and ready for mounting.
Note: Please verify your original part number against the references above. For more assistance, visit 4drive.co.uk.
