Water Pump Impeller – Fits Johnson/Evinrude 35–55 HP (Replaces 0377230, 0777213, 0777821)
Water Pump Impeller – Fits Johnson/Evinrude 35–55 HP (Replaces 0377230, 0777213, 0777821) is backordered and will ship as soon as it is back in stock.
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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.).
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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 35–55 HP (Replaces 0377...
Product Details
This high-performance Water Pump Impeller – Fits Johnson/Evinrude 35–55 HP (Replaces 0377230, 0777213, 0777821) is engineered for Johnson/Evinrude 2-Stroke outboard engines. It provides reliable cooling for 35 HP models (1958–1959), 40 HP models (1960–1970), and 50/55 HP models (1971–1978).
It serves as a direct interchange for KUNOANZ 377230/777213, Sierra 18-3083, Mallory 9-45209, GLM 89660, CEF 500352, and Peach Motor Parts PM-0777213.
- Installs as a direct OEM-equivalent replacement.
- Formulated with marine-grade neoprene rubber for saltwater resistance.
- Kit includes the impeller, drive key, gasket, and necessary o-rings.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude (OEM) | 0377230 / 377230 |
| Johnson/Evinrude (OEM) | 0777213 / 777213 |
| Johnson/Evinrude (OEM) | 0777821 |
| Sierra | 18-3083 |
| Mallory | 9-45209 |
| GLM | 89660 |
| CEF | 500352 |
| KUNOANZ | 377230 / 777213 |
| Peach Motor Parts | PM-0777213 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | Various | 35 | 2-Stroke | 1958–1959 | 0377230/377230 | With Thermostat |
| Johnson/Evinrude | Various | 40 | 2-Stroke | 1960–1970 | 0377230/377230 | |
| Johnson/Evinrude | Various | 50 | 2-Stroke | 1971–1978 | 0377230/377230, 0777213/777213 | Small Housing |
| Johnson/Evinrude | Various | 55 | 2-Stroke | 1971–1978 | 0377230/377230, 0777213/777213 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM replacement
- Housing Material
- Rubber with Brass Hub / Marine Grade CR Neoprene Rubber
- Dimensions
- Height: 6.0 in; Width: 7.13 in; Length: 0.88 in
- Weight
- 2.08–2.25 oz (0.06 kg)
- Blades
- 6
- Design
- Designed for salt water resistance
- Warranty
- Varies by seller (e.g., Limited Lifetime from Sierra, 1-year from others)
What’s in the Box
- Water Pump Impeller (0777213, 377230)
- Impeller Key (0305350, 0308928, 0777849, 308924, 308928)
- Gasket (336530, 18-2709)
- O-Rings (339543, 303059, 18-7134)
Installation Notes
- Disconnect the battery and remove the engine cover for safety.
- Locate and unbolt the lower unit (gearcase) from the outboard's leg.
- Carefully lower the gearcase to expose the water pump housing.
- Remove the bolts securing the water pump cover and note the orientation of all parts.
- Pry out the old impeller and remove the old gasket and o-rings, then clean all mating surfaces thoroughly.
- Insert the new impeller key into the driveshaft.
- Slide the new impeller on, turning the driveshaft clockwise to help bend the blades correctly inside the housing.
- Replace the gaskets and o-rings, reassemble the housing, and torque bolts to manufacturer specifications.
- Reinstall the lower unit, reconnect the battery, and test the engine in water to verify proper water flow from the tell-tale port.
Troubleshooting & FAQ
How do I know this impeller will fit my engine?
This impeller is designed for specific Johnson/Evinrude models: 35 HP (1958–1959), 40 HP (1960–1970), and 50/55 HP (1971–1978). Always cross-reference the OEM and aftermarket part numbers in our Part Number Matrix and check your engine's service manual to confirm compatibility before ordering.
What are the signs of a worn-out or failing impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the tell-tale port, and a dry, cracked, or deformed appearance of the old impeller's blades upon inspection.
How often should an outboard impeller be replaced?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., more frequently in saltwater or sandy/silty water).
What is the benefit of a neoprene rubber impeller with a brass hub?
Marine-grade neoprene rubber offers excellent resistance to heat, abrasion, and saltwater degradation. The brass hub provides a durable, corrosion-resistant connection to the driveshaft, preventing slippage and ensuring reliable performance.
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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