Water Pump Impeller – Fits Johnson/Evinrude 55-75 HP (Replaces 0765431, 0777824, 0382547)
Water Pump Impeller – Fits Johnson/Evinrude 55-75 HP (Replaces 0765431, 0777824, 0382547) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller – Fits Johnson/Evinrude 55-75 HP (Replaces 0765...
Water Pump Impeller – Fits Johnson/Evinrude 55-75 HP (Replaces 0765431, 0777824, 0382547) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller is engineered for Johnson/Evinrude 55–75 HP, 2-stroke outboard motors manufactured between 1968 and 1978. It serves as a crucial component for maintaining proper engine cooling by circulating water through the powerhead, preventing overheating and ensuring reliable performance.
It directly replaces OEM part numbers 0765431, 0777824, and 0382547, and offers an exact interchange for Sierra 18-3082, GLM 89940, Mallory Marine 9-45213, and SEI Marine 96-366-03AE.
- Installs with a slotted key for a secure drive connection.
- Constructed from a high-durability, salt-resistant neoprene rubber compound.
- Features six precision-molded blades/vanes for optimal water flow.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 0765431 |
| Johnson/Evinrude | 0777824 |
| Johnson/Evinrude | 0382547 |
| Sierra | 18-3082 |
| GLM | 89940 |
| Mallory Marine | 9-45213 |
| SEI Marine | 96-366-03AE |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is designed for select Johnson and Evinrude 2-stroke outboards from the late 1960s and 1970s. Verify your specific model falls within the listed horsepower and year ranges.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | Various | 55 | 2-Stroke | 1968–1969 | 0765431, 0777824, 0382547 | 2-Cylinder Engines |
| Johnson/Evinrude | Various | 60 | 2-Stroke | 1970–1971 | 0765431, 0777824, 0382547 | 3-Cylinder Engines |
| Johnson/Evinrude | Various | 65 | 2-Stroke | 1972–1973 | 0765431, 0777824, 0382547 | 3-Cylinder Engines |
| Johnson/Evinrude | Various | 70 | 2-Stroke | 1974–1978 | 0765431, 0777824, 0382547 | 3-Cylinder Engines |
| Johnson/Evinrude | Various | 75 | 2-Stroke | 1975–1978 | 0765431, 0777824, 0382547 | 3-Cylinder Engines |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement with slotted key
- Housing Material
- Rubber (Neoprene compound)
- Housing Color
- Black
- Dimensions
- Diameter: 54-56 mm (2.1-2.2 inches)
- Weight
- 0.06 kg (0.13 lbs)
- Fitting Type
- Slotted key drive
- Operating Temperature
- -29°C to 82°C (-20°F to 180°F)
- Other Technical Attributes
- 6 rubber blades/vanes
What’s in the Box
- 1 x Water Pump Impeller
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Remove the lower unit (gearcase) by unbolting it from the engine's midsection and disconnecting the shift linkage.
- Locate and unbolt the water pump housing, which sits on top of the lower unit.
- Remove the old impeller, taking note of the drive key's position. Clean any debris from the housing interior.
- Lightly lubricate the new impeller and housing with marine grease.
- Slide the new impeller onto the driveshaft, aligning the keyway. Rotate the shaft clockwise to bed the vanes.
- Reinstall the water pump housing, gaskets, and seals. Torque bolts to manufacturer specifications.
- Reattach the lower unit to the midsection, ensuring the driveshaft, water tube, and shift rod align correctly.
- 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 my impeller needs replacing?
Common signs of a failing impeller include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and a noticeable drop in water pressure. It is recommended to replace the impeller as part of routine maintenance every 1-2 years, regardless of visible symptoms.
Does this impeller fit both Johnson and Evinrude engines?
Yes, Johnson and Evinrude were part of the same parent company (OMC), and their parts are often interchangeable for specific models and years. This impeller is designed for the 55-75 HP range for both brands from 1968–1978.
What causes premature impeller failure?
The most common causes are running the engine dry (even for a few seconds), operating in sandy or debris-heavy water, and age. The neoprene rubber can harden and crack over time, reducing its pumping efficiency.
Is the drive key included?
This listing is for the impeller only. The drive key is typically reused from your old impeller. If it is lost or damaged, a new key must be sourced separately.
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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