This SEI Marine Upper Seal Kit is a direct-fit replacement for MerCruiser Alpha One (Gen I) sterndrives manufactured between 1972 and 1990.
It replaces OEM 26-32511A1 and includes all necessary seals and gaskets to restore factory-grade oil retention and performance in the upper gear housing.
Each kit is precision-engineered to meet OEM specifications, ensuring proper alignment, leak-free sealing, and long-lasting durability.
Built from high-quality marine-grade materials, this SEI replacement kit is backed by a 3-Year Fault-Free Warranty for complete reliability and confidence.
Product Features
- Direct OEM Replacement: Replaces MerCruiser OE# 26-32511A1
- Fitment: MerCruiser Alpha One Gen I sterndrives (1972–1990)
- Function: Complete upper gear housing seal kit for leak prevention and performance restoration
- Construction: Marine-grade rubber and gasket materials for superior sealing
- Condition: 100% brand-new SEI Marine replacement kit
- Warranty: 3-Year Fault-Free Warranty provided by SEI Marine
Additional Information
Note: This seal kit is designed for Alpha One Gen I sterndrives only.
If you require the lower seal kit or one for Gen II drives, please email or fill out the contact form, and our team will assist you in locating the correct kit for your application.
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.
