Description
Mercruiser Alpha One Lower Unit – OEM #1623-8951A43
Restore your sterndrive system with this high-quality remanufactured Mercruiser Alpha One Lower Unit, compatible with Mercruiser sterndrive engines from 1984 to 1990. This replacement gearcase (OEM #1623-8951A43) is rebuilt in the USA by certified marine mechanics using OEM Mercury / Mercruiser Parts and offers reliable power transfer and smooth operation on the water.
Whether you’re replacing a damaged unit or upgrading for peace of mind, this remanufactured Mercruiser gearcase delivers trusted performance and long-lasting durability for Alpha One drives.
View our parts finder to find Mercruiser Outboard parts diagrams to verify this is a match or contact us using the buttons at the bottom of the page.
You can also use our parts finder to find other Mercruiser Boat Parts for your Mercruiser sterndrive engine.
Don’t get stranded with sub-par units from other rebuilders. Get your quality US Boatworks reman lower unit today!
Features and Benefits
- Replaces OEM part #1623-8951A43
- Fits Mercruiser Alpha One sterndrives (1984–1990)
- Remanufactured in the USA using OEM parts
- Tested by certified marine mechanics
- Covered by a 1-Year Limited Warranty
Pricing
Total Price: $1,945
Less $250 Refundable Core Deposit
👉 Final Price: $1,695
Product Finish
- Ships in gray primer finish
- For custom matching, your order includes factory spray paint to finish if desired
Core Deposit Information
- Return your old core, get up to $250 back.
- Refund amounts vary based on the condition of your core
- Please review our Core Policy for details on how to return your old core and claim your deposit
- ♻️ Recycle your core- keep boat parts out of the landfill
Useful Resources
- 🔍 How to find your Boat Engine serial number
- Still deciding? Watch our YouTube video How avoid common lower unit replacement mistakes
- To help extend the life of your gearcase, check out our Boat Maintenance Checklist
🛥️ Please have your Engine Serial # ready when you contact us if possible. 🛥️
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