This 12-volt marine alternator is built on the Delco 10SI base design and is designed to replace Valeo-fitment units on Volvo Penta stern drive and inboard marine engines. It is corrosion-resistant hardware throughout and carries SAEJ1171 marine ignition-protection compliance for safe use around fuel vapours.
Output on this style of unit typically ranges 61-78 amps depending on the original manufacturer's build, with this unit rated at 63A. It uses an internally regulated (IR) charging system with an externally fan-cooled (EF) design, a single V-belt pulley, and a stud-type AC and ignition terminal layout matching the original equipment.
Key Features
- 12-Volt, 63-Amp charging output (Delco 10SI-type range 61-78A)
- Direct replacement for Valeo-fitment marine units
- Internally Regulated (IR), externally fan-cooled (EF)
- Corrosion-resistant hardware, SAEJ1171 marine compliant
- 12-month warranty as standard
Technical Specs
| Specification |
Detail |
| Voltage |
12V |
| Amperage |
63A (range 61-78A by manufacturer) |
| Base Design |
Delco 10SI |
| Pulley Type |
V1 (single V-belt) |
| Regulator |
IR (Internally Regulated) |
| Fan Type |
EF (Externally Cooled) |
| B+ Terminal |
M6-1.0 stud |
| AC / Ignition Terminals |
Stud type |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model |
Years |
| Volvo Penta 2002, 2003T |
1964-2004 |
| Volvo Penta 431A-B, 500A-B, 570A |
1964-2004 |
| Volvo Penta AQ115-AQ290 series |
1964-2004 |
| Volvo Penta MD / KAD Diesel Engines |
1964-2004 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 488496, 488497, 488498 |
Valeo |
Frequently Asked Questions
Will this alternator fit without modification?
Yes. This is a direct Delco 10SI-type replacement, using the same mounting, pulley type and electrical connections as the Valeo-fitment unit it replaces.
What's included?
The alternator unit only. Pulley and bracket are as fitted; existing wiring and drive belt are reused from your original unit.
How do I know my alternator has failed?
Common signs include a charge/battery warning light staying on, dimming lights, slow cranking, a flat battery despite normal use, or a whining/grinding noise from the unit.
Is this suitable for marine/petrol engine bays?
Yes, this unit is built and certified to SAEJ1171 for marine ignition-protection, making it suitable for enclosed engine bays around fuel vapours.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
