Description

Protect your MerCruiser stern drive from water intrusion with the Mercury MerCruiser Bellows Assembly 816431A1 — a genuine OEM replacement bellows kit designed to seal the gimbal housing and protect the U-joints, shift cable, and exhaust passages from the corrosive effects of raw water. Bellows failure is one of the leading causes of catastrophic stern drive damage, making timely inspection and replacement essential.

Key Features

• Genuine Mercury / MerCruiser OEM Part – Factory-engineered rubber bellows for precise fit and long-lasting seal integrity
• Protects Critical Drive Components – Seals the gimbal housing to prevent water from reaching U-joints, shift cable, and exhaust bellows passages
• Durable EPDM Rubber Construction – Resistant to ozone, UV, and the harsh marine environment for extended service life
• Prevents Costly Damage – A failed bellows can allow water to flood the bilge or destroy U-joints and bearings; regular replacement is critical preventive maintenance
• Recommended Service Interval – Mercury recommends bellows inspection annually and replacement every 3 years or as needed based on condition

Product Details

• Brand: Mercury / MerCruiser
• Part Number / SKU: 816431A1
• Type: Bellows Assembly
• OEM: Yes – Genuine Mercury part
• Application: MerCruiser Alpha One and compatible stern drive models (verify fitment using your drive serial number)

Fitment & Compatibility

This bellows assembly is designed for specific MerCruiser stern drive configurations. Always confirm compatibility using your drive’s serial number or consult your Mercury dealer before ordering. Refer to the MerCruiser service manual for proper installation procedures, including the use of bellows adhesive and correct torque specifications.

Note: Bellows replacement should be performed by a qualified marine technician. Improper installation can result in water ingestion, U-joint failure, or sinking. Inspect bellows at every haul-out.

Shipping: Ships same or next day for fast Canada wide shipping.