Alternator for Volvo Penta D1-13 D1-20 D1-30 D2-40 D2-55 Marine Diesel 12V 115A - Replaces 874502
Alternator for Volvo Penta D1-13 D1-20 D1-30 D2-40 D2-55 Marine Diesel 12V 115A - Replaces 874502
SKU:REC874502
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Alternator for Volvo Penta D1 & D2 Series Marine Diesel
Replaces Volvo Penta 874502 / 3803650 | 12V | 115A | S6 Pulley
A new aftermarket 12V 115A alternator for Volvo Penta D1-13, D1-20, D1-30, D2-40 and D2-55 marine diesels, built as a direct replacement for Volvo Penta 874502 and 3803650. It has an internal regulator and internal fan, and comes with a 6-groove serpentine pulley fitted.
On a boat the alternator also keeps the domestic bank topped up, so a weak unit shows first as batteries that never quite reach full charge, a charge light that flickers at idle, or instruments that dim when the bilge pump runs.
Key Features
- 100% new aftermarket unit - not a remanufactured core, no core charge
- Direct-fit replacement for Volvo Penta 874502 and 3803650
- 115A output - more charging headroom than the original
- Internal regulator and internal fan
- 6-groove (S6) serpentine pulley fitted
Technical Specs
| Specification | Detail |
|---|---|
| Component | Alternator |
| Voltage | 12 Volts |
| Output | 115 Amps |
| Rotation | CW (clockwise) |
| Pulley | 6-groove serpentine (S6), 61.5mm |
| Regulator | Internal (IR) |
| Fan | Internal (IF) |
| Condition | New aftermarket |
| Warranty | 12 months |
| Delivery | 5-7 working days |
Application / Fitment Guide
| Make | Application |
|---|---|
| Volvo Penta | D1-13 A/B/F |
| Volvo Penta | D1-20 A/B/F |
| Volvo Penta | D1-30 A/B/F |
| Volvo Penta | D2-40 A/B/C/F |
| Volvo Penta | D2-55 A/B/C |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only and remain the property of their respective manufacturers.
| Part Number | Manufacturer / Brand |
|---|---|
| 874502, 3803650 | Volvo Penta |
| A3TR0091 | Mitsubishi |
| 12745 | Lester |
| 400-48103 | Aftermarket reference |
Frequently Asked Questions
How do I confirm this alternator fits my engine?
Match the number on your existing alternator, or the alternator number in your engine parts list, against the cross-reference table, and check the pulley is a 6-groove serpentine. If unsure, send us your engine model and serial number and we will confirm before you order.
Why does delivery take 5-7 working days?
This part is shipped to us from our European warehouse in Spain rather than held on the shelf in the UK. We dispatch it to you as soon as it arrives.
Do I need heavier cables for the higher output?
The unit works on the standard loom, but to get the full 115A into your batteries the main charge and earth cables should be in good condition and correctly sized.
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