Description
Mercury Lower Unit #821306T6 for 30 & 40 HP 2-Stroke Outboards
Looking to restore the performance of your 30 or 40 HP Mercury 2-stroke outboard? This remanufactured lower unit is a direct-fit replacement for models using OEM part #1682-821306T6 with a 2.0 gear ratio. Whether you’re fixing an older 1995 or 1999 Mercury 40 HP outboard, or maintaining a 30 HP 2-stroke Mercury lower unit, this gearcase provides a cost-effective and reliable solution.
Professionally remanufactured in the USA by certified marine mechanics, these gearcases are constructed with OEM parts and tested for long-term durability.
View our parts finder to find Mercury 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 Mercury Boat Parts for your Mercury Outboard.
Don’t get stranded with sub-par units from other rebuilders. Get your quality US Boatworks reman lower unit today!
Benefits of Our Remanufactured Lower Units
✅ 1-Year Warranty
✅ Remanufactured by Certified Mechanics in the USA
✅ OEM Parts
✅ Significant $ Savings
Pricing
Total Price: $2,095
Less $250 Refundable Core Deposit
👉 Final Price: $1,795
Product Finish
- Gearcases come in gray primer
- Includes a can of factory spray paint for final finishing if desired
Core Deposit Information
- Return your old core, get up to $250 back.
- Refund amount will 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 & receive $ back
Useful Resources
- How to find your Boat Engine serial number
- Still deciding? Watch our YouTube video on “How to avoid common lower unit replacement mistakes“
- To help extend the life of your gearcase, check out our Boat Maintenance Checklist
US Boatworks: Quality Remanufacturing for over 40 years
🛥️ Please have your Engine Serial # ready when you contact us if possible. 🛥️





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