This SEI Marine Complete U-Joint Assembly is a direct replacement for MerCruiser I, R, MR, Alpha One, and Alpha One Gen II sterndrives manufactured from 1972 to present.
Designed for drives using the 9-9/16" engine end yoke, this precision-built assembly replaces OEM 814819A2 and ensures smooth driveline performance, reliable torque transfer, and long-lasting durability.
These greasable U-joints are serviceable and not compatible with the sealed GKN-style assemblies used on MerCruiser drives from 1998 and newer.
Built to OEM specifications and covered by SEI’s 3-Year Fault-Free Warranty, this assembly is ideal for restoring smooth, vibration-free operation in sterndrive systems.
Product Features
- Direct OEM Replacement: Replaces MerCruiser OE# 814819A2
- Fitment: MerCruiser I, R, MR, Alpha One, and Alpha One Gen II drives (1972–Present)
- Engine End Yoke Compatibility: 9-9/16" engine end yoke
- Design: Complete greasable U-joint assembly
- Compatibility Note: Does not replace sealed (GKN-style) U-joint assemblies used on 1998 and newer models
- Condition: 100% brand-new SEI Marine replacement component
- Warranty: 3-Year Fault-Free Warranty provided by SEI Marine
Additional Information
Note: These U-joints are greasable and serviceable. Not compatible with sealed GKN-style units.
If you need additional driveline or yoke components for your MerCruiser application, please email or fill out the contact form and we will assist you in locating everything needed.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com .
Please include your engine model number to help confirm proper fitment before ordering.
