1671-9760T25 Mercury Lower Unit | 50 HP, 55 HP, 60 HP

Mercury Lower Unit #9760T25 | 50–60 HP 2-Stroke Outboards

Revive the performance of your Mercury 50 HP, 55 HP or 60 HP outboard motor with 1671-9760T25 mercury lower unit. Designed for 2-stroke engines and featuring a 1.64 gear ratio, it’s a direct replacement for OEM part #1671-9760T25—commonly found on 1990s–2000s Mercury 60 HP 2-stroke models.

Every unit is remanufactured in the USA by certified mechanics using genuine Mercury Marine OEM Parts, ensuring reliable fit, function, and longevity. Whether you’re repairing a 60 HP Mercury 2-stroke, a classic 50 HP outboard, or a 55 HP boat motor, this unit offers OEM performance without the cost of brand-new parts.

Trusted by marine pros and boaters alike, our gearcases are ideal for those seeking reliable, rebuilt Mercury lower units to get back on the water quickly.

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.

Every unit leaves our shop tested and ready to perform. Call 913-342-0011 or order online now — our team confirms fitment before it ships.

Benefits of Our Remanufactured Lower Units

✅ 1-Year Warranty
✅ Remanufactured by Certified Mechanics in the USA
✅ OEM Parts 
✅ Significant $ Savings

Pricing

Total Price: $2,195
Less Potential $300 Refundable Core Deposit
👉 Final Price: $1,895

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 $300 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 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. 🛥️