Description

Exhaust Bellows HJB-4701 – Replacement for Volvo Penta & OMC Stern Drive (3850426)

Product Description

The Exhaust Bellows HJB-4701 is a premium aftermarket replacement designed for Volvo Penta and OMC Cobra stern drive exhaust systems. Manufactured from high-quality marine-grade rubber, this exhaust bellows creates a secure and flexible connection between the transom assembly and sterndrive, allowing exhaust gases to exit efficiently while helping protect the engine from water intrusion.

Engineered for demanding marine environments, the HJB-4701 offers excellent resistance to saltwater, heat, oil, ozone, and UV exposure. Its durable, flexible construction absorbs engine movement and vibration, reducing stress on the exhaust system and extending the service life of critical stern drive components. Designed to meet or exceed OEM specifications, it provides dependable performance for recreational boats, fishing vessels, cruisers, and commercial marine applications.

Key Features

• Premium marine-grade rubber construction
• Excellent resistance to heat, saltwater, oil, ozone, and UV rays
• Flexible design absorbs engine vibration and movement
• Provides a secure, watertight exhaust connection
• Direct OEM-quality aftermarket replacement
• Designed for long-lasting performance in harsh marine conditions
• Suitable for freshwater and saltwater use
• Easy installation using appropriate marine bellows adhesive and clamps

Compatible OEM & Aftermarket Part Numbers

• Volvo Penta: 3850426, 3850426-2
• OMC: 914036
• Mallory: 9-72711
• GLM: 89190
• Sierra: 18-2764, 18-1074

Applications

Compatible with selected:

• Volvo Penta SX, SX-M, DP-S, DP-SM stern drives
• OMC Cobra stern drives (1994 and newer models)
• 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
• Helps prevent water intrusion into the sterndrive
• Reduces vibration and stress on exhaust components
• Extends the service life of marine drive systems
• Durable construction for reliable long-term operation
• Ideal for routine stern drive maintenance and repairs

Technical Specifications

Why Choose the HJB-4701 Exhaust Bellows?

Replacing worn or cracked exhaust bellows is essential to maintain proper exhaust flow and protect your stern drive from water damage. The HJB-4701 Exhaust Bellows is engineered for a precise fit and dependable sealing performance, making it an excellent replacement for compatible Volvo Penta and OMC stern drive systems. Its durable construction ensures reliable performance even in demanding saltwater environments.