Water Pump Impeller Kit – Fits OMC Cobra Stern Drive 2.3–7.5L (Replaces 983895, 984461)
Water Pump Impeller Kit – Fits OMC Cobra Stern Drive 2.3–7.5L (Replaces 983895, 984461) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Water Pump Impeller Kit – Fits OMC Cobra Stern Drive 2.3–7.5L (Repl...
Product Details
This Water Pump Impeller Kit – Fits OMC Cobra Stern Drive 2.3–7.5L (Replaces 983895, 984461) is designed for OMC Cobra Stern Drive engines including 2.3L, 2.5L, 3.0L, 4.3L, 5.0L, 5.7L, 5.8L, and 7.5L models manufactured between 1986 and 1993. It is not compatible with OMC Cobra SX or Stringer drives.
This kit serves as a direct replacement for OMC part numbers 983895, 984461, and 984744, as well as aftermarket equivalents from Sierra (18-3058), Mallory (9-45280), GLM (89950), and SEI Marine (96-109-03/96-109-01K).
- Installs in the OEM Cobra Stern Drive upper gear housing.
- Impeller is constructed from durable CR-Neoprene with a hardened Nylon hub.
- Kit includes the impeller, gasket, and O-ring for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 983895 |
| OMC | 984461 |
| OMC | 984744 |
| Sierra | 18-3058 |
| Mallory | 9-45280 |
| GLM | 89950 |
| SEI Marine | 96-109-03 |
| SEI Marine | 96-109-01K |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
OMC Cobra Stern Drive Applications
| Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| 2.3L | 4-Stroke | 1987–1990 | 983895 | Except models with short impeller or retrofitted with short impeller kit |
| 2.5L | 4-Stroke | 1986 | 983895 | 4-cylinder models |
| 3.0L | 4-Stroke | 1986–1993 | 983895 | Except models with short impeller or retrofitted with short impeller kit |
| 4.3L | 4-Stroke | 1986–1993 | 983895 | 6-cylinder models |
| 5.0L | 4-Stroke | 1986–1993 | 983895 | 8-cylinder models |
| 5.7L | 4-Stroke | 1986–1992 | 983895 | Except Year 1992 5.7L.E. models |
| 5.8L | 4-Stroke | 1989–1993 | 983895 | 8-cylinder models |
| 7.4L | 4-Stroke | 1990–1991 | 983895 | 8-cylinder models |
| 7.5L | 4-Stroke | 1987–1990 | 983895 | 8-cylinder models |
| 350 HP | 4-Stroke | 1989 | 983895 | 8-cylinder models |
| 350 HP 5.7L | 4-Stroke | 983895 | 8-cylinder models |
Technical Specs
- Product Type
- Water Pump Impeller Service Kit
- Installation
- OEM Cobra Stern Drive Upper Gear Housing
- Dimensions
- Impeller: 2.310 in (58.7 mm) diameter × 1.615 in (41.0 mm) height
- Weight
- 3.84 oz (108.9 g)
- Fitting Type
- Direct Shaft Mount
- Impeller Material
- CR-Neoprene and hardened Nylon
- Number of Blades
- 10
- Internal/Hub/Shaft Size
- 0.491 inch (12.5 mm)
What’s in the Box
- 1 × Water Pump Impeller (983895/0983895)
- 1 × Seal O-ring (911704/0911704)
- 1 × Gasket (911702/0911702)
- 1 × Installation Instructions
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Place the stern drive in the full tilt position to access the lower unit.
- Remove the lower unit by unfastening the mounting bolts and disconnecting the shift linkage.
- Locate and unbolt the water pump housing to expose the impeller.
- Remove the old impeller, noting the rotational direction of the blades. Lubricate the new impeller and housing interior with a suitable marine grease.
- Install the new impeller, ensuring the blades are oriented correctly (typically by turning the driveshaft in its normal rotational direction).
- Replace the housing gasket and O-ring with the new ones provided in the kit.
- Securely fasten the water pump housing, ensuring bolts are torqued to manufacturer specifications.
- Reinstall the lower unit, reconnecting the shift linkage and fastening all bolts.
- Lower the drive, reconnect the battery, and test the engine using a water supply (flushing muffs) to verify proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this fits my specific Cobra drive?
This kit is for most OMC Cobra drives from 1986–1993. The key is that it uses the "long" 1.615-inch tall impeller. Some early models or retrofitted units use a shorter impeller. Always measure your old impeller or check your OEM service manual if you are unsure. This kit does NOT fit Cobra SX or Stringer drives.
What are the signs of a failing water pump impeller?
Common symptoms include engine overheating at idle or low speeds, a weak or intermittent stream from the water tell-tale outlet, and visible cracking, tearing, or hardening of the impeller blades upon inspection. It is a critical wear item that should be replaced regularly.
How often should I replace my impeller?
For preventative maintenance, most manufacturers recommend replacing the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. Usage in saltwater or sandy/silty conditions may require more frequent replacement.
Is this kit difficult to install?
Installation requires basic mechanical skills and tools to remove the sterndrive's lower unit. While it can be a DIY job for those comfortable with marine mechanics, we recommend professional installation if you are not familiar with the process to ensure safety and prevent damage.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
