Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559, 438557, 343462, etc.)
Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559, 438557, 343462, etc.) is backordered and will ship as soon as it is back in stock.
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Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replac...
Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559, 438557, 343462, etc.) is backordered and will ship as soon as it is back in stock.
Product Details
This is an aftermarket Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559), engineered as a direct replacement for engines requiring a 3-nipple fuel pump configuration. It is designed to restore original fuel system performance for a wide range of Johnson and Evinrude outboard models.
This component serves as a direct interchange for Johnson/Evinrude part numbers 438559, 438557, 343462, 0438559, 0438558, and 5005462.
- Installs as a direct OEM-style replacement.
- Features a 3-nipple connection for fuel in, fuel out, and a vacuum pulse line.
- Operates as a mechanical pulse-driven fuel pump.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Johnson/Evinrude | 438559 | Primary Replacement |
| Johnson/Evinrude | 438557 | Interchangeable |
| Johnson/Evinrude | 343462 | Interchangeable |
| Johnson/Evinrude | 0438559 | Interchangeable |
| Johnson/Evinrude | 0438558 | Interchangeable |
| Johnson/Evinrude | 5005462 | Interchangeable |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This fuel pump fits a wide variety of Johnson and Evinrude outboard motors from 25 HP to 140 HP, plus specific Crossflow engines. Please verify your engine has a 3-nipple fuel pump before ordering.
| Brand | Model | Rated HP | OEM Part No. | Notes |
|---|---|---|---|---|
| Johnson/Evinrude | Various | 25 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 35 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 50 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 65 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 70 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 75 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 85 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 88 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 90 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 100 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 105 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 115 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 125 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 135 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Various | 140 | 438559 | 3-nipple configuration |
| Johnson/Evinrude | Crossflow engines | 140, 155, 175, 185, 200, 235 | 438559 | Specific to Crossflow engine designs |
Technical Specs
- Product Type
- Outboard Engine Fuel Pump
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Connection
- 3-nipple configuration
- Fitting Type
- 3 fuel line nipples
- Other Technical Attributes
- Mechanical fuel pump with pulse line
What’s in the Box
- 1 x Outboard Fuel Pump (438559)
Installation Notes
- Disconnect the battery negative terminal for safety.
- Place a rag under the fuel pump to catch any gasoline spills.
- Carefully disconnect the fuel inlet, fuel outlet, and pulse vacuum lines from the old pump. Note their positions.
- Remove the mounting bolts securing the old fuel pump and remove the pump.
- Clean the mounting surface and inspect the gasket area. Replace gaskets if necessary.
- Mount the new fuel pump, ensuring it is correctly oriented. Secure it with the original mounting bolts.
- Reconnect the fuel and pulse lines to their corresponding nipples on the new pump. Ensure connections are tight.
- Prime the fuel system if required by your engine manufacturer.
- Reconnect the battery, start the engine, and carefully check for any fuel leaks around the pump and its fittings.
Troubleshooting & FAQ
How do I confirm this fuel pump is correct for my motor?
Verify three things: 1) Your engine is a Johnson or Evinrude model within the 25-140 HP range. 2) Your current fuel pump has a 3-nipple configuration (fuel in, fuel out, pulse line). 3) Your old part number is listed in our Part Number Matrix, such as 438559 or 438557.
What are the symptoms of a bad fuel pump?
Common signs include the engine having trouble starting, bogging down or losing power under acceleration, sputtering at high speeds, or stalling completely. These issues occur when the pump can no longer supply the carburetor with a consistent and adequate flow of fuel.
Can I use this to replace a VRO pump?
Yes, this mechanical pulse pump is commonly used to bypass the fuel delivery side of a failing or disconnected VRO (Variable Ratio Oiling) pump. If you perform this conversion, you must pre-mix your gasoline and 2-stroke oil in the fuel tank according to your engine's specifications.
What is the 'pulse line' for?
The pulse line connects the fuel pump to the engine's crankcase. The alternating pressure (pulse) created by the piston's movement inside the crankcase actuates a diaphragm inside the pump, which in turn draws fuel from the tank and pushes it to the carburetor.
Is there any maintenance required for this pump?
These pumps are sealed units and are not serviceable; they are designed to be replaced when they fail. To extend its service life, always use fresh fuel, a clean fuel tank, and replace your fuel filters at recommended intervals to prevent debris from damaging the internal diaphragm.
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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