Fuel Pump Assembly – Fits Mercury 25-40 HP EFI (4-Stroke)
Fuel Pump Assembly – Fits Mercury 25-40 HP EFI (4-Stroke) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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
Product Details
This is a replacement Fuel Pump Assembly for Mercury 25-40 HP EFI (4-Stroke) outboard engines. It is designed as a direct-fit external mount component to restore fuel system performance on applicable 25 HP, 30 HP, and 40 HP 4-stroke models.
This part replaces Mercury OEM numbers PAF40-05050000, 881862T1, 881862T07, 892874T, 899106T, and 8M0141844.
- Installation Type: External Mount
- Connection: 3 Hose Ports (Input, Output, Cooling)
- Included essential: Comes with required gasket for a secure seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | PAF40-05050000 | |
| Mercury | 881862T1 / 881862T07 | 892874T, 899106T, 8M0141844 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury models, this pump fits a range of 4-stroke EFI outboards. Please verify your specific model and part number.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | Outboard | 25 | 4-Stroke | 881862T1/881862T07 | |
| Mercury | Outboard | 30 | 4-Stroke | 881862T1/881862T07 | |
| Mercury | Outboard | 40 | 4-Stroke | 881862T1/881862T07 | Superseded by 892874T, 899106T, 8M0141844 |
Technical Specs
- Product Type
- Mechanical Fuel Pump Assembly
- Installation
- External Mount
- Fuel Type
- Gasoline
- Connection
- 3 Hose Ports (Input, Output, Cooling)
- Housing Material
- Alloy Steel
- Housing Color
- Black
- Dimensions
- 9.0 × 9.0 × 9.0 cm (3.54 × 3.54 × 3.54 in)
- Weight
- 0.41 kg (0.9 lb)
- Fitting Type
- Barb
- Other Technical Attributes
- Includes Gasket: PAGB/T3452.1-25X3.0
What’s in the Box
- 1 x Fuel Pump Assembly (PAF40-05050000)
- 1 x Gasket (PAGB/T3452.1-25X3.0)
Installation Notes
- Disconnect the battery and relieve fuel system pressure to prevent spills.
- Carefully label and disconnect the fuel inlet, outlet, and cooling hoses from the old pump.
- Unbolt and remove the old fuel pump assembly from the engine block.
- Clean the mounting surface and install the new gasket provided.
- Mount the new fuel pump assembly, ensuring bolts are tightened to the manufacturer's torque specification.
- Reconnect all hoses securely to their correct ports.
- Reconnect the battery, prime the fuel system, and check thoroughly for any leaks before starting the engine.
Troubleshooting & FAQ
How do I confirm this pump fits my engine?
Your first step is to check the part number on your original pump. If it matches any of the numbers in our Part Number Matrix (like 881862T1), it's a direct replacement. You can also use the Engine & Model Compatibility table to verify by HP and model.
What are common signs of a failing fuel pump?
Symptoms of a bad fuel pump include difficulty starting, engine sputtering or stalling (especially at high speeds or under load), loss of power, and poor fuel economy. A visual inspection may also reveal fuel leaks from the pump housing.
How is this mechanical pump driven?
This type of mechanical fuel pump is typically driven by a cam or lever connected to the engine's camshaft. As the engine runs, the lever actuates a diaphragm inside the pump to draw fuel from the tank and send it to the engine.
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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