Description
Volvo Penta SX-D Upper Gearcase – 23290085 | 1.79, 1.89, 1.97, 2.18 Ratios
Maximize your time on the water with a precision-remanufactured Volvo Penta SX-D Upper Gearcase (OEM #23290085). Engineered specifically for high-performance single-propeller sterndrives, this upper unit is the professional choice for restoring smooth, reliable shifting to your sport boat or cruiser. Unlike generic alternatives, our gearcases are rebuilt right here in the USA by factory-certified technicians using Genuine Volvo-Penta internal components.
We don’t just “fix” gearcases; we restore/remanufacture them to exceed OEM standards through a rigorous multi-point inspection and cleaning process. With a focus on durability and exact-fit compatibility for 1.79, 1.89, 1.97, and 2.18 gear ratios, this unit eliminates the guesswork and gets you back to cruising with confidence. Don’t settle for sub-par units—invest in a US Boatworks remanufactured upper and enjoy the peace of mind that comes with a 1-year warranty.
Fits
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System: Volvo Penta SX-D Sterndrives
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Compatible Gear Ratios: 1.79, 1.89, 1.97, 2.18
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OEM Part Number: 23290085
- Tooth Count: 21/26
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Common Engine Pairings: Often found on 4.3L, 5.0L, and 5.7L gasoline Volvo-Penta engines
- Popular replacement: Great choice for those upgrading from older SX models to the “D” series
✅ Features & Benefits
| Reliability | OEM-Spec Durability: Every unit is built with 100% genuine Volvo bearings and seals to handle high-torque demands. |
| Expertise | Precision Gearing: Expertly shimmed and bench-tested by our US-based technicians to ensure quiet operation. |
| Value | $ Back: Don’t forget to recycle your core to receive your $300 credit back. |
Pricing
Total Price: $3,495
Less $300 Refundable Core Deposit
👉 Final Price: $3,195
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
Need Help?
- How to find your Boat Engine serial number?
- To help extend the life of your gearcase, watch out our Boat Maintenance Checklist
- Still deciding? Watch our YouTube video on “How avoid common lower unit replacement mistakes“
US Boatworks: Quality Remanufacturing for over 40 years
🛥️ Please have your Engine Serial # ready when you contact us if possible. 🛥️
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