Gearcase Seal Kit – Fits OMC/Johnson/Evinrude 4-Cylinder Stern Drives (Replaces 982947)
Gearcase Seal Kit – Fits OMC/Johnson/Evinrude 4-Cylinder Stern Drives (Replaces 982947) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gearcase Seal Kit – Fits OMC/Johnson/Evinrude 4-Cylinder Stern Driv...
Product Details
This Gearcase Seal Kit provides all the necessary components to reseal the lower drive on OMC/Johnson/Evinrude 4-cylinder stern drives. It is specifically designed for 120, 140, and 400 series models, as well as 2.5L and 3.0L engines manufactured between 1981 and 1993 for Stringer/800 Series applications. This kit is not compatible with Cobra Stern Drive models.
This kit serves as a direct replacement for multiple part numbers, including OMC 982947/0982947, Sierra Marine 18-2664, SEI Marine 95-104-11K, Red Rhino OS-138/OS-244, and GLM 87640.
- Professional installation is highly recommended to ensure a proper seal and long-term performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 982947 / 0982947 |
| Sierra Marine | 18-2664 |
| SEI Marine | 95-104-11K |
| Red Rhino | OS-138 / OS-244 |
| GLM | 87640 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
The following table details compatibility with various OMC stern drive models. Verify your specific model and year range.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | 120 Series | 120 | 4-Stroke | 1981–1985 | 982947 | Stringer/800 Series |
| OMC | 140 Series | 140 | 4-Stroke | 1981–1985 | 982947 | Stringer/800 Series |
| OMC | 400 Series | 140-170 | 4-Stroke | 1981–1985 | 982947 | Stringer/800 Series |
| OMC | 2.5L | 150-170 | 4-Stroke | 1981–1993 | 982947 | Stringer/800 Series |
| OMC | 3.0L | 180-225 | 4-Stroke | 1981–1993 | 982947 | Stringer/800 Series |
| OMC | Cobra (Small Hub) | Various | 4-Stroke | 1986–1989 | 982947 | Red Rhino OS-244 equivalent |
Technical Specs
- Product Type
- Lower Drive Gearcase Seal Kit
- Weight
- 0.44 lb (0.2 kg)
- Dimensions
- 20.0″ L x 13.0″ W x 3.0″ H
- Application
- For Stringer/800 Series stern drive applications
- Installation
- Professional recommended
What’s in the Box
- A comprehensive set of seals, O-rings, and gaskets for a complete lower gearcase reseal.
Installation Notes
For optimal results, we strongly recommend professional installation by a qualified marine mechanic. This ensures all components are seated correctly, torqued to manufacturer specifications, and tested for leaks. Always consult your engine’s official service manual for detailed procedures and safety precautions specific to your model.
Troubleshooting & FAQ
How do I know if this seal kit fits my stern drive?
Check your engine model, series, and year against the compatibility table. This kit is for OMC/Johnson/Evinrude 4-cylinder, 120/140/400 series, 2.5L, and 3.0L models (1981–1993) using the Stringer/800 Series drive. Visually comparing your old seals to our product images is also a good practice.
Does this kit fit OMC Cobra models?
Our data indicates this kit does not fit OMC Cobra Stern Drives. While some cross-references suggest compatibility with certain Cobra hubs (as Red Rhino OS-244), our primary fitment data excludes them. We recommend sourcing a Cobra-specific seal kit to ensure proper fit and function.
What are the signs my gearcase seals are failing?
Common indicators include a milky, white or creamy appearance in your gear lube (indicating water intrusion), visible oil leaks around the propeller shaft or drive shaft housing, or a persistent low gear lube level without obvious external leaks.
How often should gearcase seals be replaced?
Seals should be inspected annually when you change your gear lube. We recommend replacing them every 3-5 years as part of preventative maintenance, or immediately if you notice any signs of leaks or water intrusion.
Is everything I need for the job included?
This kit includes the necessary seals, O-rings, and gaskets for the gearcase. However, it does not include gear lube, tools, or sealants/adhesives that may be required by your service manual.
Do I need special tools for this installation?
Yes, specialized tools such as a bearing carrier retainer wrench, seal drivers, and a pressure/vacuum tester are often required for a professional installation. Attempting the job without the correct tools can damage the new seals or the gearcase housing.
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.
Payment & Security
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