Description
Mercury Outboard Lower Unit I-4, #1667-9011J7
This remanufactured lower unit is built to fit Mercury I-4 outboards with 100 to 125 horsepower, model years 1987 and newer. Designed for 3-dog reverse units and made to OEM specifications, this gearcase offers a dependable replacement for OEM #1667-9011J7. Each unit is remanufactured in the USA using genuine Mercury Marine parts and precision machining to ensure performance and long-term reliability.
Whether you’re repairing your fishing boat or restoring a legacy Mercury motor, this gearcase provides a cost-effective, factory-matching solution.
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 V6 Outboard.
Don’t get stranded by other sub-par units. Get your quality US Boatworks reman lower unit today!
Benefits of Remanufactured Mercury Lower Units
✅ 1-Year Warranty
✅ Rebuilt by Certified Mechanics in the USA
✅ OEM Parts
✅ Significant $ Savings
Pricing
Total Price: $2,295
Less $300 Potential Refundable Core Deposit
👉 Final Price: $1,995
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 $300 back.
- Refund amount may 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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