Water Pump Impeller – Fits Johnson/Evinrude 8-15 HP (Replaces 386084, 18-3050, 9-45201, 500355)
Water Pump Impeller – Fits Johnson/Evinrude 8-15 HP (Replaces 386084, 18-3050, 9-45201, 500355) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Johnson/Evinrude 8-15 HP (Replaces 38608...
Product Details
This is a direct replacement Water Pump Impeller – Fits Johnson/Evinrude 8-15 HP Outboards (Replaces 386084). It is designed for a broad range of Johnson and Evinrude outboard motors, covering 8 HP, 9.9 HP, and 15 HP models. It is compatible with 2-Stroke engines manufactured from 1974 and up, as well as 4-Stroke engines from 1995–2001.
This part provides a direct interchange for Johnson/Evinrude 386084, OMC 386084, Sierra 18-3050, GLM 9-45201, and CEF 500355, ensuring a reliable fit and function for routine maintenance or repair.
- Engineered for a press fit on the drive shaft.
- Constructed with a durable brass hub and robust rubber blades.
- Direct replacement for simplified installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 386084 |
| OMC | 386084 |
| Sierra | 18-3050 |
| GLM | 9-45201 |
| CEF | 500355 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is confirmed to fit the following Johnson and Evinrude outboard motors.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Johnson | Outboard | 8 | 2-Stroke | 1974 and up | 386084 |
| Johnson | Outboard | 9.9 | 2-Stroke | 1974 and up | 386084 |
| Johnson | Outboard | 15 | 2-Stroke | 1974 and up | 386084 |
| Johnson | Outboard | 8 | 4-Stroke | 1995–2001 | 386084 |
| Johnson | Outboard | 9.9 | 4-Stroke | 1995–2001 | 386084 |
| Johnson | Outboard | 15 | 4-Stroke | 1995–2001 | 386084 |
| Evinrude | Outboard | 8 | 2-Stroke | 1974 and up | 386084 |
| Evinrude | Outboard | 9.9 | 2-Stroke | 1974 and up | 386084 |
| Evinrude | Outboard | 15 | 2-Stroke | 1974 and up | 386084 |
| Evinrude | Outboard | 8 | 4-Stroke | 1995–2001 | 386084 |
| Evinrude | Outboard | 9.9 | 4-Stroke | 1995–2001 | 386084 |
| Evinrude | Outboard | 15 | 4-Stroke | 1995–2001 | 386084 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Connection
- Press fit on drive shaft
- Housing Material
- Brass hub with rubber blades
- Housing Color
- Black
What’s in the Box
- 1 x Water Pump Impeller (386084)
Installation Notes
- Disconnect the battery and spark plug wires for safety.
- Place the outboard gear shift in the neutral position.
- Remove the lower unit (gearcase) by unbolting it from the engine's midsection.
- Unscrew the bolts holding the water pump housing and slide it up the driveshaft.
- Remove the old impeller, noting the rotational direction of the blades.
- Clean the housing and wear plate of any debris or corrosion. Apply a light coat of marine grease to the interior.
- Slide the new impeller onto the drive shaft, rotating it in the same direction as the old one to bend the blades correctly.
- Reinstall the water pump housing, ensuring a proper seal.
- Reattach the lower unit to the midsection and tighten all bolts to the manufacturer's torque specifications.
- Reconnect the battery and test the engine in water, confirming a steady stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my motor?
This impeller fits Johnson/Evinrude 8-15 HP Outboards (2-Stroke 1974+ and 4-Stroke 1995-2001). Cross-reference your existing part number with the provided list (386084, 18-3050, etc.) and check the compatibility table. Always visually compare the new part to your old one before installation.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. Visible signs on the old impeller include cracked, brittle, or missing blades.
How often should I replace my water pump impeller?
As a preventative maintenance measure, it's recommended to replace the impeller every 1-2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater). An impeller can degrade over time even if the engine isn't used frequently.
Is this a difficult part to install?
Installation is straightforward for those with mechanical experience. It involves removing the lower unit (gearcase). If you are not comfortable performing this task, we strongly recommend professional installation to prevent damage.
Is this impeller compatible with both 2-stroke and 4-stroke engines?
Yes, it is designed to work with specific Johnson and Evinrude models in both 2-Stroke (1974 and up) and 4-Stroke (1995–2001) versions within the 8-15 HP range. See the detailed compatibility list to confirm your exact model.
What is the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to meet or exceed OEM-level specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard return window for unused items in their original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchasing. If anything differs—even if your model appears compatible—do not complete the purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is highly recommended for safety, proper function, and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions with a typical transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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