# 21849939 Flywheel | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Flywheel - Part Number: 21849939

Heavy-duty engine flywheel for D9A2L MH installations. It stores rotational energy, provides the starter ring-gear mounting interface and connects engine torque to the driven equipment; ring gear 3838729 is a related separate component.

  

⚙️ Key Features

• D9A2L MH engine application

• Heavy-duty rotational mass

• Starter ring-gear interface

• Machined crankshaft mounting face

• Related ring gear 3838729

  

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21849939 (current OEM reference)

  

OEM / Related Numbers:

• 21849939

• 3838729 (related gear ring)

  

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

  

🚤 Compatibility

Commonly used on:

• Volvo Penta D9A2L MH engine and crank mechanism

  

Typically suits:

• Engine models:

• D9A2L MH

• Engine Type: 9-litre 6-cylinder turbocharged marine-commercial diesel

• Serial Range: Confirm flywheel housing, ring gear and driven-equipment arrangement

  

🔌 Function

Smooths crankshaft speed between combustion events, carries the starter ring gear and transfers torque to the coupling or transmission.

  

Common signs of failure:

• Cracked or heat-spotted friction/coupling face

• Damaged starter-ring teeth

• Loose flywheel fasteners or fretting

• Driveline vibration

• Incorrect run-out or balance after damage

  

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 7651.34 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7651.34 AUD | In stock |

## Images

- 21849939 Flywheel | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21849939-flywheel-genuine-volvo-penta)
> Updated: 2026-08-03