# 21268949 Alternator Kit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta mounting kit for a large-casing extra alternator on D3 engines, weighing 6.5 kg and listed for eleven D3 applications. The catalogue lists it against 12V/130A, 24V/75A and 24V/110A alternators on the 4 inch dual foot saddle mount to SAE J180, and the alternator itself is not included. It is the only kit on this page covering three different alternator ratings.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D3-110I-B
-   Volvo Penta D3-110I-C
-   Volvo Penta D3-130I-C
-   Volvo Penta D3-110I-A
-   Volvo Penta D3-130I-A
-   Volvo Penta D3-160I-A
-   Volvo Penta D3-160I-C
-   Volvo Penta D3-190I-B
-   Volvo Penta D3-190I-C
-   Volvo Penta D3-130I-B
-   Volvo Penta D3-160I-B

-   **Engine Family:** D
-   **HP Range:** 110-190 HP
-   **Year Range:** Approximately 2004 onward; accessory layout varies by D3 suffix

## ⚙️ Key Features

-   For 12V/130A, 24V/75A or 24V/110A alternators
-   Large casing, 4 inch dual foot saddle mount to SAE J180
-   For D3 engines
-   Alternator not included
-   6.5 kg
-   Supplied without the alternator
-   Capacity: 12V/130A, 24V/75A, 24V/110A
-   Fits: D3

## 📋 Kit Contents

-   Bracket - part number 21190567 - quantity 1
-   Stud L50 - part number 993609 - quantity 1
-   Stud L90 - part number 993610 - quantity 1
-   Bracket - part number 21190799 - quantity 1
-   Flange screw L45 - part number 948217 - quantity 1
-   Flange nut - part number 996472 - quantity 1
-   Pulley - part number 3818325 - quantity 1
-   Flange screw L150 - part number 978447 - quantity 1
-   Flange screw L60 - part number 965194 - quantity 1
-   Flange nut M12x1.50 - part number 971096 - quantity 1
-   Alternator and drive belt 30731809 are separate

## 🔌 Function

Mounts, aligns and tensions a second high-output alternator so it can charge auxiliary battery banks independently of the standard engine alternator.

## ⚠️ Common Signs of Failure

-   Alternator or belt running out of alignment
-   Bracket cracking or fasteners loosening
-   Repeated belt wear or squeal
-   Charging output short of the alternator's rating
-   Interference with the engine cover or an adjacent accessory

## 🛠️ Service Notes

-   Confirm the alternator has the large casing and 4 inch dual foot SAE J180 pattern before ordering
-   The alternator is a separate order line whichever of the three ratings you choose
-   Check belt alignment and tension after fitting and again after the first hours of running
-   For a large casing, 4 inch dual foot saddle mount alternator (SAE J180 mount)

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21268949 → Supersedes 3841445

### OEM / Related Numbers

-   3841445 earlier number superseded by this part
-   30731809 related drive belt
-   3818325 pulley

## 📦 Condition

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

## Details

- **Price:** 2042.68 AUD
- **Vendor:** Volvo Penta
- **Type:** Charging & Alternators
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2042.68 AUD | In stock |

## Images

- 21268949 Alternator Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21268949-alternator-kit-genuine-volvo-penta)
> Updated: 2026-09-18