2-Stroke Fuel Pump for Johnson/Evinrude 18–35 HP – Replaces 438555, 433386, 777764
2-Stroke Fuel Pump for Johnson/Evinrude 18–35 HP – Replaces 438555, 433386, 777764 is backordered and will ship as soon as it is back in stock.
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2-Stroke Fuel Pump for Johnson/Evinrude 18–35 HP – Replaces 438555,...
2-Stroke Fuel Pump for Johnson/Evinrude 18–35 HP – Replaces 438555, 433386, 777764 is backordered and will ship as soon as it is back in stock.
Product Details
This replacement fuel pump is designed for Johnson and Evinrude 2-stroke outboard engines in the listed 18–35 HP range. The company fitment record specifically identifies Johnson/Evinrude 20–30 HP 2-stroke applications from 1990–2000, while the broader listed horsepower range also includes 18, 28, and 35 HP applications.
The pump uses a three-nipple design with an external pulse connection for vacuum-operated fuel delivery. Verify your exact engine model, year, serial information, original pump configuration, and replacement numbers before ordering.
- Replacement fuel pump for Johnson/Evinrude 2-stroke outboard engines.
- Three-nipple configuration with an external pulse connection.
- Listed for 18, 20, 25, 28, 30, and 35 HP applications.
- Sold as a single fuel pump assembly; additional components are not listed as included.
Part Number Matrix
These are the manufacturer and aftermarket reference numbers associated with this replacement pump. A reference number alone does not replace verification of the complete engine application.
| Brand or Reference | Part Number |
|---|---|
| Johnson/Evinrude | 438555 |
| Johnson/Evinrude | 433386 |
| Johnson/Evinrude | 777764 |
| Sierra | 18-7353 |
Engine & Model Compatibility
Use the following information as a fitment guide. The exact model and year must be checked before installation because horsepower ranges can include multiple engine configurations.
| Brand | Rated HP | Stroke | Documented Application | Reference Numbers |
|---|---|---|---|---|
| Johnson/Evinrude | 18 | 2-Stroke | Listed in the company horsepower range; verify the exact model and year. | 438555, 433386, 777764 |
| Johnson/Evinrude | 20 | 2-Stroke | 1990–2000 | 438555, 433386, 777764 |
| Johnson/Evinrude | 25 | 2-Stroke | Listed in the company horsepower range; verify the exact model and year. | 438555, 433386, 777764 |
| Johnson/Evinrude | 28 | 2-Stroke | Listed in the company horsepower range; verify the exact model and year. | 438555, 433386, 777764 |
| Johnson/Evinrude | 30 | 2-Stroke | 1990–2000 | 438555, 433386, 777764 |
| Johnson/Evinrude | 35 | 2-Stroke | Listed in the company horsepower range; verify the exact model and year. | 438555, 433386, 777764 |
Technical Specs
- Product Type
- 2-stroke outboard fuel pump
- Application
- Johnson/Evinrude outboard engines
- Rated Horsepower
- 18, 20, 25, 28, 30, and 35 HP listed
- Stroke
- 2-Stroke
- Connection Design
- Three nipple connections
- Pulse Operation
- External pulse connection
- Replacement References
- 438555, 433386, 777764, and Sierra 18-7353
- Product Configuration
- Single fuel pump assembly
What’s in the Box
- 1 × Fuel pump assembly
Mounting gaskets, cable ties, fuel lines, and pump-rebuild components are not listed as included. The separate Sierra catalog reference to kit 18-7800 describes a related service kit and does not indicate that a kit is included with this fuel pump.
Installation Notes
- Review the engine service manual and confirm the replacement number and pump configuration before beginning work.
- Stop the engine, allow it to cool, disconnect the battery if applicable, and work in a well-ventilated area away from ignition sources.
- Relieve fuel-system pressure as directed by the engine manufacturer. Use shop towels or an approved container to catch fuel.
- Label the fuel inlet, fuel outlet, and external pulse connections before disconnecting the original pump.
- Remove the original pump and inspect the mounting surface, hoses, clamps, and fittings for damage or contamination.
- Install the replacement pump in the same orientation as the original unit. Use only the gasket or sealing components specified by the engine service manual.
- Reconnect each line to the correct nipple and secure the connections without overtightening or damaging the hoses.
- Prime the fuel system according to the engine manufacturer’s instructions, then inspect the pump and all connections for leaks before operating the engine.
- After starting, verify stable fuel delivery and check again for leaks. Do not operate the engine if fuel leakage is present.
Troubleshooting & FAQ
How do I know if this fuel pump fits my engine?
Confirm that your engine is a Johnson or Evinrude 2-stroke outboard in the listed 18–35 HP range. The documented catalog application specifically covers 20–30 HP engines from 1990–2000. Also compare the original pump’s three-nipple and external-pulse configuration and verify the applicable reference number before ordering.
Is this pump for 2-stroke or 4-stroke engines?
This product is listed for 2-stroke Johnson/Evinrude outboard engines. It is not presented as a 4-stroke application.
Is this a two-line or three-line fuel pump?
This is a three-nipple fuel pump. Its configuration includes fuel connections and an external pulse connection used to operate the pump.
Does the package include a gasket or fuel-pump rebuild kit?
No additional gasket, cable ties, or rebuild kit is listed as included. This listing is for one fuel pump assembly. A separate service kit may be required depending on the engine and installation procedure.
What are common signs of a failing fuel pump?
Possible symptoms include hard starting, fuel starvation, loss of power, sputtering, stalling under load, or fuel leakage. These symptoms can also be caused by blocked filters, damaged hoses, carburetor problems, or an incorrect pulse connection, so inspect the complete fuel system.
Is this an OEM fuel pump?
This listing identifies the product as a replacement fuel pump associated with the listed Johnson/Evinrude reference numbers. Verify the manufacturer and exact specifications required for your application before installation.
Safety & Important Info
- Fuel is flammable. Work outdoors or in a properly ventilated area and keep the product away from flames, sparks, and hot surfaces.
- Verify the engine brand, horsepower, stroke, model, year, serial information, connection layout, and reference number before purchase.
- Do not rely on horsepower alone to confirm fitment.
- Use the engine manufacturer’s service procedures and approved fuel-system components.
- Professional installation is recommended if you are not experienced with marine fuel systems.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for maintaining compatible outboard systems.
- Application-Focused Information — Reference numbers and fitment details are provided to help you compare your original part.
- Support for Maintenance — Always verify the complete engine application and follow the manufacturer’s service instructions before installation.
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