This SEI Marine Complete U-Joint Assembly with Short Yoke is designed for MerCruiser I, R, MR, and Alpha One sterndrives manufactured between 1972 and 1982.
It fits applications using the 8-1/8" engine end yoke, including inline 4-cylinder and inline 6-cylinder engines.
Precision-engineered to OEM specifications, this greasable assembly ensures smooth power transfer, reduced vibration, and long service life.
Replaces OEM 58858A1 and is backed by SEI’s 3-Year Fault-Free Warranty for quality and reliability.
Product Features
- Direct OEM Replacement: Replaces MerCruiser OE# 58858A1
- Fitment: MerCruiser I, R, MR, and Alpha One sterndrives (1972–1982)
- Engine Compatibility: Inline 4 and inline 6 engines
- Yoke Length: 8-1/8" (short yoke)
- Design: Complete U-joint assembly with greasable fittings
- Condition: 100% brand-new SEI Marine replacement assembly
- Warranty: 3-Year Fault-Free Warranty provided by SEI Marine
Additional Information
Note: This assembly is designed for early-style applications using the short (8-1/8") engine end yoke.
Not compatible with later models using long yokes or sealed-style U-joints.
If you need assistance finding the correct U-joint or yoke assembly for your application, please email or fill out the contact form and we’ll help you locate the right parts.
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.
