Exhaust Bellows HJB-0572

Availability: In stock Category EXHAUST BELLOWS

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OEM P.N : 18654A1

SIERRA P/N : 18-2750

CEF P.N : 500512K

Description
Frequently Asked Questions (FAQs)
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Description

Exhaust Bellows HJB-0572 – Replacement for MerCruiser Stern Drive (OEM 18654A1)

Product Description

The Exhaust Bellows HJB-0572 is a premium aftermarket replacement designed for MerCruiser stern drive exhaust systems. Manufactured from high-quality marine-grade rubber, this bellows provides a secure, flexible, and watertight connection between the transom assembly and the sterndrive, ensuring efficient exhaust gas discharge while helping prevent water intrusion into critical engine components.

Designed to withstand demanding marine conditions, the HJB-0572 offers outstanding resistance to heat, saltwater, oil, ozone, and UV exposure. Its flexible construction absorbs engine movement and vibration, reducing stress on the exhaust system and extending the service life of your stern drive components.

This exhaust bellows is a direct replacement for OEM Part Number 18654A1, Sierra 18-2750, and CEF 500512K, making it an ideal choice for routine maintenance, repairs, and sterndrive rebuilds. It is compatible with numerous MerCruiser Alpha, Bravo, TRS, and Blackhawk stern drive applications.

Key Features

Premium marine-grade rubber construction
Direct replacement for OEM 18654A1
Excellent resistance to saltwater, heat, oil, ozone, and UV rays
Flexible design absorbs engine vibration and movement
Provides a secure, watertight exhaust connection
OEM-quality aftermarket replacement
Long service life in freshwater and saltwater environments
Ideal for maintenance, repairs, and sterndrive overhauls

Compatible Part Numbers

OEM: 18654A1
Sierra: 18-2750
CEF: 500512K
Also replaces: 32734A3

Applications

Compatible with a wide range of MerCruiser stern drive systems, including:

MerCruiser MC-I
MerCruiser MR
MerCruiser Alpha One
MerCruiser Alpha One Gen II
MerCruiser TRS
MerCruiser Bravo I
MerCruiser Bravo II
MerCruiser Bravo III
MerCruiser Blackhawk

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

Benefits

Restores proper exhaust system performance
Helps prevent water intrusion into the bell housing
Reduces vibration and stress on exhaust components
Extends the service life of the sterndrive
Durable construction for long-lasting marine performance
Ideal for preventive maintenance and engine rebuilds

Technical Specifications

Specification	Details
Product Name	Exhaust Bellows
Model	HJB-0572
OEM Replacement	18654A1
Sierra Equivalent	18-2750
CEF Equivalent	500512K
Material	Marine-grade rubber
Color	Black
Application	MerCruiser Stern Drive Exhaust System
Condition	New

Why Choose the HJB-0572 Exhaust Bellows?

A damaged exhaust bellows can lead to exhaust leaks, water intrusion, and costly stern drive repairs. The HJB-0572 Exhaust Bellows is engineered for precise fitment, reliable sealing, and long-lasting durability. Built to meet or exceed OEM specifications, it delivers dependable performance for recreational boats, fishing vessels, cruisers, and commercial marine applications.

Q1. What does the HJB-0572 Exhaust Bellows replace?
It replaces OEM 18654A1, Sierra 18-2750, CEF 500512K, and 32734A3.

Q2. Which stern drive models is it compatible with?
It is suitable for MerCruiser MC-I, MR, Alpha One, Alpha One Gen II, TRS, Bravo I, Bravo II, Bravo III, and Blackhawk stern drive systems.

Q3. Is it suitable for saltwater use?
Yes. It is manufactured from marine-grade rubber designed to resist saltwater, heat, oil, ozone, and UV exposure.

Q4. Does the bellows include a clamp?
Many equivalent versions, including the Sierra replacement, are supplied with a stainless-steel clamp for installation. Check the product package contents before installation.

Q5. When should the exhaust bellows be replaced?
Inspect it annually and replace it if there are signs of cracks, leaks, hardening, or wear. Preventive replacement during stern drive servicing helps avoid costly engine and transom repairs.