# 21757311 Gear Set | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta IPS2 Matched Reduction Gear Set - Part Number: 21757311

  

Matched gear set used in the Volvo Penta IPS2 lower-gear assembly. The documented reduction ratio is approximately 1.70:1, and the gears must remain together as a matched set.

  

⚙️ Key Features

  

• Genuine Volvo Penta matched gear set

• IPS2 drive application

• Documented ratio: approximately 1.70:1

• Matched contact pattern and tooth geometry

• Drive serial and ratio verification required

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21757311 (current OEM service number)

  

OEM / Related Numbers:

  

• VOE21757311

• Associated lower gear: 21757950

• Volvo Penta Reman lower gears: 3801721 and 3801722

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta IPS2 reduction-gear assemblies

  

Typically suits:

  

• Engine models / systems:

• IPS2-A

• IPS2-C

• IPS2 applications with 1.70:1 gear ratio

  

• Drive Type: Volvo Penta IPS

• Ratio: approximately 1.70:1

• Fitment Note: Confirm drive serial and gear-ratio marking

  

🔌 Function

  

Transfers and reduces rotational speed through the IPS lower gear while maintaining the matched tooth contact pattern.

  

Common signs of failure:

  

• Gear whine

• Pitting or tooth damage

• Metal in gear oil

• Excessive backlash

• Incorrect contact pattern after setup

  

🧰 Assembly / Kit Reference

  

Matched gear set for the IPS2 reduction assembly. The surrounding service components commonly include:

• Needle bearing - Part Number: 993987

• Shaft - Part Number: 3819139

• Bearing box - Part Number: 3818421

• Shim group - Part Numbers: 991005, 991006 and 991007

• Shim group - Part Numbers: 991008, 991009 and 991010

  

These surrounding parts are selected and ordered separately unless specifically supplied with the gear set.

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 10439.98 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10439.98 AUD | In stock |

## Images

- 21757311 Gear Set | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21757311-gear-set-genuine-volvo-penta)
> Updated: 2026-08-03