# 21609861 Flexible Coupling | Genuine Volvo Penta Part

## 🔧 Product Description

Torsional flexible coupling for the Volvo Penta MGX-5065-A marine gear installation. It connects the engine/flywheel drive to the gearbox while damping torsional vibration and accommodating small alignment movements.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D13C2-B MP
-   Volvo Penta D13C1-A MP
-   Volvo Penta D13C2-A MP
-   Volvo Penta D13C3-A MP
-   Volvo Penta D13C4-A MP
-   Volvo Penta D13B-A MP
-   Volvo Penta D13B-H MP
-   Volvo Penta D13B-B MP
-   Volvo Penta D13B-D MP
-   Volvo Penta D13B-C MP
-   Volvo Penta D13C4-B MP
-   Volvo Penta D13C5-A MP
-   Volvo Penta D13C7-B MP
-   Volvo Penta D13C8-B MP

-   **Engine Family:** D

## ⚙️ Key Features

-   Genuine Volvo Penta flexible coupling
-   Specific to MGX-5065-A marine gear installation
-   Damps driveline torsional vibration
-   Factory bolt pattern, hub and clutch-flange interface
-   Alignment and fastener torque must be checked during installation
-   Engine type: Volvo Penta marine propulsion driveline

## 🔌 Function

Transfers engine torque to the marine gear while isolating torsional pulses and minor relative movement.

## ⚠️ Common Signs of Failure

-   Knocking or rattling at idle/load changes
-   Rubber element cracking or separation
-   Excess driveline vibration
-   Loose bolts or fretting at the flange
-   Loss of drive if the coupling element fails

## 🛠️ Service Notes

-   Check and set the alignment of the engine and drive before and after fitting a flexible coupling — it absorbs vibration and a small amount of misalignment, it does not correct a driveline that is out of line
-   Handle the rubber elements carefully and keep them clear of oil, fuel and solvents, which soften and swell rubber and shorten its life dramatically
-   Fit the coupling as a complete unit, use new locking hardware wherever the workshop manual for your engine specifies it, and tighten the fasteners to the figures in that manual
-   Turn the driveline over by hand after assembly and check that it runs true, with no binding and no excessive free play
-   Inspect the coupling whenever the drive is separated for any other reason; the rubber is the part that ages, and planned replacement is far cheaper than a failure at sea

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21575444 related flexible coupling
-   21575446 hub
-   844765 clutch flange

## 📦 Condition

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

## Details

- **Price:** 10683.99 AUD
- **Vendor:** Volvo Penta
- **Type:** Clutch & Couplings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10683.99 AUD | In stock |

## Images

- 21609861 Flexible Coupling | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21609861-flexible-coupling-genuine-volvo-penta)
> Updated: 2026-10-10