Description
Propeller shaft for MerCruiser Alpha One Gen II and Vazer - 816431A1
Keep water out of your MerCruiser with this original gimbal boot!
This universal joint boot, also known as a U-joint boot, is an important part of your MerCruiser sterndrive. It protects the universal joint and other components from water ingress, which can cause corrosion and damage.
Suitable for:
- MerCruiser Alpha One Gen II (1991 and newer)
- MerCruiser Vazer sterndrives
Product details:
- Part number: 816431A1
- Type: Cardan bellows / U-joint bellows
- Material: Flexible, ribbed composite
- Included: Hose clamps for both ends
Advantages:
- Durable: Made of durable composite that resists abrasion and salt water.
- Tight: Effectively prevents water from entering the bell housing.
- Easy installation: Can be installed with common tools.
- Original quality: Manufactured by Mercury Marine to strict OEM specifications.
Why is it important to replace the cardan shaft?
A worn or damaged gimbal boot can lead to water ingress, which can cause corrosion and damage to the U-joint and other drive components, resulting in expensive repairs and downtime.
Keyword: Miscellaneous service parts

