Description

Exhaust Bellows HJB-1872 – Replacement for Volvo Penta & OMC Stern Drive (3852742)

The Exhaust Bellows HJB-1872 is a premium replacement exhaust bellows designed for Volvo Penta and OMC Cobra stern drive systems. Manufactured from high-quality marine-grade rubber, this exhaust bellows provides a secure, watertight connection between the transom assembly and the sterndrive while safely directing exhaust gases overboard.

Built to withstand harsh marine environments, continuous engine vibration, heat, saltwater, oil, and UV exposure, the HJB-1872 helps maintain proper exhaust flow and protects critical engine components from water intrusion. It is an ideal replacement for worn, cracked, or deteriorated bellows during sterndrive maintenance or overhaul.

Designed to meet or exceed OEM specifications, this replacement bellows offers reliable performance for recreational boats, fishing boats, cruisers, and commercial marine applications.

Key Features

• High-quality marine-grade rubber construction
• Excellent resistance to saltwater, oil, heat, ozone, and UV exposure
• Flexible design absorbs engine movement and vibration
• Provides a watertight seal between the sterndrive and transom assembly
• Helps ensure efficient exhaust gas discharge
• Direct aftermarket replacement meeting OEM specifications
• Easy installation with proper marine bellows adhesive and clamps
• Suitable for freshwater and saltwater applications

Compatible OEM & Aftermarket Part Numbers

• Volvo Penta: 3852742, 912376, 913592
• OMC Stern Drive: 3852742
• Sierra: 18-2781
• Mallory: 9-72801
• GLM: 89230

These part numbers are commonly listed as interchangeable replacements for this style of exhaust bellows.

Applications

Suitable for many Volvo Penta and OMC Cobra stern drive systems, including selected:

• Volvo Penta sterndrive engines
• OMC Cobra sterndrives
• Petrol marine engines
• Recreational boats
• Fishing boats
• Cabin cruisers
• Commercial marine vessels

Always verify your engine model and OEM part number before ordering.

Benefits

• Restores proper exhaust system performance
• Reduces the risk of water entering the exhaust system
• Helps extend sterndrive service life
• Durable construction for long-lasting marine use
• Reliable replacement during bellows maintenance
• Designed for dependable sealing and flexibility

Technical Specifications

Why Choose This Exhaust Bellows?

A damaged exhaust bellows can allow water intrusion and reduce exhaust system efficiency. Replacing worn bellows with the HJB-1872 Exhaust Bellows helps maintain reliable engine performance and protects your stern drive components from premature wear. Engineered for durability and precise fitment, it is an excellent replacement choice for marine maintenance and repair.