# 21661904 Propeller | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Type IH4 Front Aluminium Duoprop Propeller - Part Number: 21661904

  

A three-blade left-hand-rotation front propeller from the Volvo Penta Type IH4 aluminium Duoprop system for DPS-B drives with helical propeller-shaft splines.

  

⚙️ Key Features

  

• Propeller size: IH4

• Front propeller position

• Three-blade left-hand rotation

• High-strength squeeze-cast aluminium

• Four-layer corrosion-resistant paint system

• Matched to the corresponding four-blade rear propeller

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• Current OEM reference: 21661904

• Type IH replaces the earlier straight-spline Type I arrangement on DPS-B helical-spline drives

  

OEM / Related Numbers:

  

• 21661904

• 21661944 - Complete Type IH4 front and rear propeller set

• 21661924 - Matching Type IH4 rear propeller

• 21631162 - Rear propeller nut

• 3851569 - Front propeller nut

• 3855516 - Duoprop tool kit

  

Aftermarket / Verified Equivalents:

  

• No direct aftermarket equivalent

  

🚤 Compatibility

  

• DPS-B sterndrive with helical propeller-shaft splines

• D3-140A-E / D3-140A-F / D3-140A-H

• D3-170A-E / D3-170A-F

• D3-170I-F

• D3-200A-E / D3-200A-F

• D3-200I-F

• D3-220A-E / D3-220A-F

• D3-220I-F

• 4.3Gi-Q / 4.3GXi-Q / 4.3GXiE-Q / 4.3GXIE-225-R

• Approved for D3 diesel and 4.3L petrol installations below approximately 38 knots / 45mph

• Do not mix Type I and Type IH propellers on the same drive

• Twin-engine installations must use the same type and size on both drives

• Use the specified Type FH stainless-steel family for higher-speed applications

  

🔌 Function

  

The front propeller works with the matched rear propeller to produce counter-rotating thrust, reduced steering torque, strong acceleration and efficient planing.

  

Common signs of failure or damage:

  

• Bent, chipped or cracked blades

• Cavitation erosion

• Vibration under load

• Reduced acceleration or top speed

• Hub or spline damage

• Mismatched front and rear propellers

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 960.34 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 960.34 AUD | In stock |

## Images

- 21661904 Propeller | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21661904-propeller-genuine-volvo-penta)
> Updated: 2026-08-03