This SEI Marine Shift Shaft is a precision-built replacement for MerCruiser I, R, MR, and Alpha One sterndrives manufactured between 1973 and 1990.
Designed to OEM specifications, this component ensures proper shift linkage alignment and smooth, reliable gear engagement.
It replaces OEM 77481-1 and is crafted from durable marine-grade materials to resist corrosion and wear in demanding marine environments.
Backed by SEI’s 3-Year Fault-Free Warranty, this shift shaft offers lasting reliability and OEM-quality performance.
Product Features
- Direct OEM Replacement: Replaces MerCruiser OE# 77481-1
- Fitment: MerCruiser I, R, MR, and Alpha One drives (1973–1990)
- Design: High-strength shift shaft for smooth and precise shifting
- Construction: Marine-grade corrosion-resistant materials
- Condition: 100% brand-new SEI Marine replacement component
- Warranty: 3-Year Fault-Free Warranty provided by SEI Marine
Additional Information
Note: Compatible with MerCruiser Alpha One Generation I sterndrives only (not Gen II).
If you require additional internal or linkage components for a complete shift system rebuild, 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.
