Universal Joint Boot for Mercruiser Alpha One Gen. 2, MD816431

• Universal Joint Boot for Mercruiser Alpha One Gen. 2, MD816431

The universal joint boot for the MerCruiser Alpha One Gen.2, MD816431, seals the area around the universal joint, prop shaft, and gimbal bearing against water and debris, and accommodates the movements of the Z-drive during steering and trimming.

Compatible with the following models:

• MerCruiser Alpha One Gen.2 manufactured in 1991 or later
• MerCruiser Alpha One Gen.2 with serial numbers starting at 0D469859
• MerCruiser Vazer with the same bellows design

Technical Notes:

• U-joint boot for the driveshaft area
• protects the universal joint and gimbal bearing from water ingress
• For Gen. II and compatible Vazer models only

Replaces the following part numbers:

• MerCruiser 816431A1

FAQs about this item:

What is the function of this bellows?
It seals the propeller shaft tunnel and protects the moving drive components from moisture and dirt.

For which drives is it suitable?
It is suitable for Alpha One Gen.2 models from 1991 onward, as well as compatible Vazer drives with the same bellows design.

When should the bellows be replaced?
Immediate replacement is recommended if there are cracks, the material is porous, grease has leaked out, or water is present in the bell housing.