# 3840307 Regulator Kit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta regulator kit for 28V charging, from the Alternator, Charging, Electric Motor, Electric Drives group, weighing 0.156 kg and listed for 74 applications on D series engines. The 28V rating is the ordering detail - it must match the alternator it goes into.

## 🚤 Compatibility

-   **Engine Family:** D

Full model list at the end of this description.

## ⚙️ Key Features

-   28V
-   0.156 kg
-   74 applications on D series engines
-   Serviceable kit, so the whole alternator need not be replaced

## 🔌 Function

Holds the alternator's output at the correct charging voltage as engine speed and electrical load change.

## ⚠️ Common Signs of Failure

-   Batteries persistently undercharged, or boiling and losing electrolyte from overcharging
-   Charge voltage reading high, low or unstable at the panel
-   Charge lamp glowing dimly or flickering
-   Lights brightening and dimming with engine speed
-   Burnt smell or heat discolouration around the regulator

## 🛠️ Service Notes

-   Check this kit's 28V rating matches the alternator, such as the 28V, 80A unit 3840183
-   Confirm the belt tension, battery condition and earth straps before blaming the regulator
-   Inspect the brushes and slip ring while the regulator is off

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-A MP, D13B-C MH, D13B-H MP, D13B-G MP, D13B-L MP, D13B-E MH, D13B-E MH (FE), D13B-K MP, D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-M MP, D13B-C MP, D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C5-A MP, D13C7-B MP, D13C8-B MP, D13C9-A MP
-   Volvo Penta D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP, D11B3-A MP, D11B4-A MP, D11A-A, D11A-B, D11A-C, D11A-D, D11A-E, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP, D11B1-A MP
-   Volvo Penta D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
-   Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP, D8A7-A MP, D8A8-A MP
-   Volvo Penta D12D-B MP, D12D-D MP, D12D-G MP, D12D-H MP

## Details

- **Price:** 749.1 AUD
- **Vendor:** Volvo Penta
- **Type:** Service & Repair Kits
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 749.10 AUD | In stock |

## Images

- 3840307 Regulator Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3840307-regulator-kit-genuine-volvo-penta)
> Updated: 2026-09-01