# 21344476 Flange | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta output flange for HS25-series hydraulic reverse gears. The flange mounts on the transmission output shaft and provides the bolted coupling interface to the propeller shaft or intermediate coupling. Correct flange pilot, bolt pattern, shaft spline/taper and gearbox ratio specification must be matched.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D3-110I-C
-   Volvo Penta D3-130I-C
-   Volvo Penta D2-55F
-   Volvo Penta D2-50F
-   Volvo Penta D2-75F
-   Volvo Penta D2-60F
-   Volvo Penta D3-110I-G
-   Volvo Penta D3-110I-H
-   Volvo Penta D3-160I-C
-   Volvo Penta HS25A
-   Volvo Penta HS25A-B
-   Volvo Penta HS25
-   Volvo Penta HS25AE-A

-   **Engine Family:** D, HS
-   **HP Range:** 50-160 HP

## ⚙️ Key Features

-   Genuine Volvo Penta reverse-gear output flange
-   Confirmed HS25-series transmission application
-   Interfaces the gearbox output shaft with the propeller-shaft coupling
-   Precision pilot and bolt-circle geometry
-   Match gearbox suffix, ratio and output-shaft revision
-   Engine type: Volvo Penta marine engine installation with HS25-series reverse gear

## 🔌 Function

Transfers transmission output torque through the shaft coupling while maintaining concentric alignment.

## ⚠️ Common Signs of Failure

-   Visible run-out or propeller-shaft vibration
-   Fretting, corrosion or looseness at the shaft interface
-   Cracks or elongated coupling-bolt holes
-   Damaged sealing surface causing output-shaft oil leakage
-   Pilot or bolt-pattern mismatch during installation

## 🛠️ Service Notes

-   Clean both mating faces back to clean metal and check them for flatness and for burrs or old gasket left in the sealing area; a face pulled up around a stud hole will not seal however hard it is tightened
-   Always fit a new gasket, seal or O-ring where the joint uses one, and only use a jointing compound if the workshop manual for your engine calls for one at that joint
-   Draw the fasteners up evenly in stages, working across the flange rather than round it, and finish to the tightening sequence and figures given for your engine
-   Inspect studs, nuts and threads while the joint is apart and renew anything corroded, stretched or seized — exhaust-side fasteners rarely come out twice
-   Re-check the joint for leaks once the engine has been up to working temperature and cooled again

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   3582121 - associated O-ring
-   3582051 - associated output-shaft seal
-   3888146 - associated output shaft

## 📦 Condition

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

## Details

- **Price:** 1075.37 AUD
- **Vendor:** Volvo Penta
- **Type:** Marine Equipment
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1075.37 AUD | In stock |

## Images

- 21344476 Flange | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21344476-flange-genuine-volvo-penta)
> Updated: 2026-09-06