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