Water Pump Impeller – Fits Johnson/Evinrude 8–15 HP Outboards (Replaces 386084, 0386084, 0777817)
Water Pump Impeller – Fits Johnson/Evinrude 8–15 HP Outboards (Replaces 386084, 0386084, 0777817) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller – Fits Johnson/Evinrude 8–15 HP Outboards (Repl...
Water Pump Impeller – Fits Johnson/Evinrude 8–15 HP Outboards (Replaces 386084, 0386084, 0777817) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller – Fits Johnson/Evinrude 8–15 HP Outboards is a direct-fit replacement for Johnson and Evinrude outboard motors. It is designed for 8 HP, 9.9 HP, and 15 HP models, including 2-Stroke engines from 1974 and newer, as well as 4-Stroke engines manufactured between 1995 and 2001.
It serves as a direct replacement for multiple part numbers, including Johnson/Evinrude 386084, OMC 386084, Sierra 18-3050, GLM 9-45201, and CEF 500355.
- Installs via a simple press fit on the drive shaft.
- Constructed with a durable brass hub and six high-performance neoprene rubber blades.
- Engineered to meet or exceed original equipment specifications for reliable cooling.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 386084 / 0386084 |
| Johnson/Evinrude | 0777817 |
| OMC | 386084 |
| Sierra | 18-3050 |
| GLM | 9-45201 |
| CEF | 500355 |
| ITACO | 0386084/18-3050 |
| CarBole | 18-3050 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is designed for a wide range of Johnson outboards, covering popular 2-Stroke models from 1974 onward and 4-Stroke models from the 1995–2001 period.
It also fits equivalent Evinrude outboards, including 2-Stroke models from 1974 and up, and 4-Stroke models from 1995 to 2001, ensuring broad compatibility.
| 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; Press fit on drive shaft
- Materials
- Brass hub with Neoprene rubber blades
- Number of Blades
- 6
- Dimensions
- Outer Diameter: 38 mm (1.50 in) | Depth/Height: 17.7 mm (0.69 in) | Shaft Diameter: 12.8 mm (0.49 in)
- Weight
- 17.8 g (0.039 lb)
- Warranty
- 1 Year (JLM Marine), Lifetime (CarBole)
What’s in the Box
- 1 x Water Pump Impeller (Replaces 386084)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Shift the outboard into neutral gear.
- Drain the gearcase oil from the lower unit.
- Unbolt and carefully separate the lower unit (gearcase) from the upper engine housing.
- Locate and remove the water pump housing cover, noting the position of all bolts and seals.
- Slide the old impeller off the driveshaft. You may need to remove a key or pin.
- Clean the housing interior and inspect for wear, scoring, or corrosion. Replace the housing if damaged.
- Lightly grease the new impeller and the inside of the housing with marine grease.
- Slide the new impeller onto the driveshaft, ensuring the blades are oriented correctly (typically rotating clockwise during installation).
- Reinstall the water pump housing, seals, and bolts, tightening to the manufacturer's torque specifications.
- Reattach the lower unit to the engine, refill the gearcase oil, and reconnect the battery.
- Test the engine in water, confirming a steady stream of water from the "telltale" outlet.
Troubleshooting & FAQ
Which Johnson/Evinrude outboards is this impeller for?
This impeller is designed for 8 HP, 9.9 HP, and 15 HP Johnson and Evinrude outboards. This includes 2-Stroke models made from 1974 onward and 4-Stroke models made between 1995 and 2001. Always verify your specific model and OEM part number before ordering.
How do I know if my impeller needs to be replaced?
Common signs of a failing water pump impeller include a weak or non-existent water stream from the "telltale" port, engine overheating alarms, and visible damage like cracked, brittle, or worn-down blades on the old impeller upon inspection.
What is the recommended replacement interval?
For preventative maintenance, it is recommended to inspect and likely replace your water pump impeller every one to two years, or every 100-200 hours of operation. This can vary based on usage conditions (e.g., saltwater vs. freshwater, sandy/silty water).
The listed dimensions vary slightly from other sources. Why?
Minor differences in measurements (e.g., 17.7mm vs. 16.87mm) can occur between different aftermarket manufacturers and measurement methods. The specifications we list are based on the most frequently cited data and are confirmed to fit the listed engine models. This part is a direct replacement for OEM part 386084.
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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