21277185 Bellows | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta XDP / XDP-B U-Joint Bellows Service Kit - Part Number: 21277185

Genuine Volvo Penta U-joint bellows service kit for XDP and XDP-B sterndrives. The flexible bellows seals the universal-joint cavity between the transom assembly and drive while allowing steering and trim movement. It replaces earlier bellows references 3886847, 3841482 and 3860419.

⚙️ Key Features

• Genuine Volvo Penta XDP bellows service kit

• Confirmed XDP and XDP-B sterndrive application

• Supersedes three earlier bellows references

• Flexible marine-grade rubber construction

• Inspect U-joints, sealing lands and clamp grooves during replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21277185 → Supersedes 3886847

• 3886847 → Supersedes 3841482

• 3841482 / 3860419 (earlier bellows references)

OEM / Related Numbers:

• 21277185 - current OEM reference

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

Kit Contents:

• U-joint bellows assembly: 21277185

• Retaining clamps: supplied under service-kit reference 21277185; separate Volvo service numbers are not published in the available kit breakdown

🚤 Compatibility

Commonly used on:

• Volvo Penta XDP and XDP-B sterndrive transom assemblies

Typically suits:

• Engine models:

• XDP

• XDP-B

• Serial / Specification Control: Drive model, transom-shield revision and serial number control fitment.

• HP Range: Drive-controlled fitment

• Engine Type: Volvo Penta petrol marine engine with XDP/XDP-B sterndrive

• Year Range: XDP/XDP-B production; drive-serial controlled

🔌 Function

Prevents seawater from entering the U-joint and input-shaft cavity while allowing drive trim and steering movement.

Common signs of failure:

• Cracking, checking or hardening of the rubber

• Water entry into the bellows or U-joint cavity

• Loose, corroded or displaced retaining clamps

• Grease washout, corrosion or noise from the U-joint

• Bellows age or service history exceeding the recommended inspection interval

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging