This SEI Marine Heavy Duty U-Joint is a direct replacement for a wide range of Mercruiser, OMC Cobra (Joint Venture), and Volvo Penta SX sterndrives. Designed for long-term durability with a greasable service design, this U-Joint restores smooth driveline performance and reliability.
Compatible with Mercruiser sterndrives from 1970–1997, as well as OMC Cobra (Joint Venture 1986–1997) and Volvo Penta SX applications.
Will not replace sealed Mercruiser U-Joints and will not fit Mercruiser units with serial numbers above 0K999999.
Product Features
- Heavy-duty greasable U-Joint
- Replaces OEM#: 3850812
- Fits Mercruiser sterndrives (1970–1997)
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Also fits:
- OMC Cobra (Joint Venture) 1986–1997
- Volvo Penta SX
- Will not replace Mercruiser sealed U-joints
- Will not fit Mercruiser serial numbers above 0K999999
- Built for enhanced strength and driveline reliability
Additional Information
Ideal as a service replacement for driveline vibration, worn joints, or full sterndrive rebuild projects.
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A PayPal money request will be emailed for any additional charges.
(Some items may be excluded from international shipping.)
Customer Support
For questions or compatibility confirmation, email: customerservice@marinepartswarehouse.com
Please include your engine model number.
