Seal Kit – Fits Mercury 4.80 Inch Torpedo Gearcase on FourStroke & Verado Outboards (Replaces 26-830749A01)
Seal Kit – Fits Mercury 4.80 Inch Torpedo Gearcase on FourStroke & Verado Outboards (Replaces 26-830749A01) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Seal Kit – Fits Mercury 4.80 Inch Torpedo Gearcase on FourStroke &a...
Product Details
This is a complete Seal Kit – Fits Mercury 4.80 Inch Torpedo Gearcase on FourStroke & Verado Outboards. It is meticulously designed for Mercury Marine Verado and FourStroke outboard models that are equipped with the 4.80-inch "Torpedo" gearcase. This kit provides all the essential seals and components needed to completely rebuild the lower unit, restoring its integrity and performance.
This kit serves as a direct replacement for OEM part number Mercury 26-830749A01, ensuring a precise fit and reliable function.
- Prevents gear oil leaks and protects against water intrusion.
- Engineered for installation in the lower unit (gearcase).
- Contains all necessary components for a comprehensive reseal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 26-830749A01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury engines, please ensure your model is equipped with the 4.80" Torpedo Gearcase as this kit is specific to that application.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | VERADO (4 CYL.) | 135 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (4 CYL.) | 150 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (4 CYL.) | 175 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (4 CYL.) | 200 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (6 CYL.) | 200 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (6 CYL.) | 225 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (6 CYL.) | 250 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (6 CYL.) | 275 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | VERADO (6 CYL.) | 300 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | PRO VERADO (6 CYL.) | 200 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | PRO VERADO (6 CYL.) | 250 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
| Mercury | PRO VERADO (6 CYL.) | 300 | 4-Stroke | 26-830749A01 | For 4.80" Torpedo Gearcase |
Technical Specs
- Product Type
- Gearcase Seal Kit
- Installation
- Lower Unit / Gearcase
- Dimensions
- 14.0" L x 11.0" W x 1.5" H
- Weight
- 0.13 lb (0.06 kg)
- Application
- 4.80 Inch Torpedo Gearcase
- Part Type
- Aftermarket Replacement
What’s in the Box
- Complete seal kit (replaces 26-830749A01) containing all necessary seals and O-rings for gearcase service.
Installation Notes
- Disconnect the battery and ensure the engine is properly secured.
- Drain the gearcase oil completely into a suitable container.
- Carefully remove the lower unit from the outboard motor.
- Disassemble the gearcase, methodically laying out all components and noting their orientation.
- Remove all old seals, gaskets, and O-rings from the housing and shafts.
- Thoroughly clean all sealing surfaces, ensuring they are free of old sealant, debris, and corrosion.
- Carefully install the new seals and components from the kit. Use a seal driver for proper seating and apply marine-grade sealant where specified in your service manual.
- Reassemble the gearcase, torquing all bolts to the manufacturer's specified values.
- Reinstall the lower unit onto the engine.
- Refill the gearcase with the correct type and amount of new marine gear oil.
- Before launching, perform a final check for any signs of leaks.
Troubleshooting & FAQ
How do I know if my gearcase seals are failing?
Common signs include milky or water-contaminated gear oil (check the drain plug magnet), visible oil leaks around the propeller shaft or driveshaft, or a recurring loss of gear oil between changes.
Is this kit compatible with all Mercury Verado models?
This kit is specifically for Verado and FourStroke models equipped with the 4.80-inch "Torpedo" gearcase. It is not compatible with other gearcase sizes (like the 5.44"). Always verify your gearcase type before ordering.
What is the recommended service interval for gearcase seals?
While there is no fixed interval from the manufacturer, it is best practice to inspect for leaks at every oil change. Seals should be replaced whenever the gearcase is disassembled for service, if any signs of a leak are detected, or as preventative maintenance every 5-7 years in saltwater environments.
Do I need special tools for this installation?
Yes, installation typically requires a bearing puller, a seal driver set, and a torque wrench, in addition to standard hand tools. Using a press may also be necessary for certain seals. Consulting a service manual for your specific engine model is highly recommended.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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