Mechanical Fuel Pump – Fits Volvo Penta AQ120-AQ251 Series (Replaces 841161, 18-7286)
Mechanical Fuel Pump – Fits Volvo Penta AQ120-AQ251 Series (Replaces 841161, 18-7286) 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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Mechanical Fuel Pump – Fits Volvo Penta AQ120-AQ251 Series (Replace...
Product Details
This aftermarket Mechanical Fuel Pump is a high-quality replacement designed for a range of Volvo Penta 4-cylinder engines, including the AQ120B, AQ125, AQ131, AQ140, AQ145, AQ151, AQ171, 230, 250, and 251 series. It ensures reliable fuel delivery for consistent engine performance.
The pump serves as a direct interchange for Volvo Penta part numbers 841161, 841161-3, 867464, and 867465, along with aftermarket cross-references from Sierra (18-7286), GLM (77011), and Mallory (9-35425).
- Installs directly onto the engine block.
- Features a provision for the vent tube to the carburetor for safety.
- Includes a new mounting gasket for a complete and proper seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Volvo Penta | 841161 |
| Volvo Penta | 841161-3 |
| Volvo Penta | 867464 |
| Volvo Penta | 867465 |
| Sierra | 18-7286 |
| Sierra | 187286 |
| GLM | 77011 |
| Mallory | 9-35425 |
Engine & Model Compatibility
Confirm your engine model in the table below. This pump fits a wide range of Volvo Penta gasoline engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Volvo Penta | AQ120B | 120 | 4-Stroke | 841161 |
| Volvo Penta | AQ125A, AQ125B | 125 | 4-Stroke | 841161 |
| Volvo Penta | AQ131A, AQ131B, AQ131C, AQ131D | 131 | 4-Stroke | 841161 |
| Volvo Penta | AQ140A | 140 | 4-Stroke | 841161 |
| Volvo Penta | AQ145A, AQ145B | 145 | 4-Stroke | 841161 |
| Volvo Penta | AQ151A, AQ151B, AQ151C | 151 | 4-Stroke | 841161 |
| Volvo Penta | AQ171A, AQ171C | 171 | 4-Stroke | 841161 |
| Volvo Penta | 230A, 230B | 230 | 4-Stroke | 841161 |
| Volvo Penta | 250A, 250B | 250 | 4-Stroke | 841161 |
| Volvo Penta | 251A | 251 | 4-Stroke | 841161 |
| Volvo Penta | BB140A | 140 | 4-Stroke | 841161 |
| Volvo Penta | BB145A | 145 | 4-Stroke | 841161 |
Technical Specs
- Product Type
- Mechanical Fuel Pump
- Installation
- Engine Block Mounted
- Fuel Type
- Gasoline
- Connection
- Threaded (NPT)
- Housing Material
- Metal
- Housing Color
- Silver/Chrome
- Weight
- 189g (0.42 lb)
- Fitting Type
- Threaded
- Other Technical Attributes
- Includes provision for vent tube to carburetor
- Warranty
- Manufacturer dependent (typically 1 year)
What’s in the Box
- 1 x Fuel Pump (841161)
- 1 x Mounting Gasket
Installation Notes
- Disconnect the vessel's battery and shut off the fuel supply valve.
- Place absorbent rags or a container below the fuel pump to catch any spillage.
- Carefully disconnect the inlet and outlet fuel lines from the pump. Note their orientation.
- Unbolt the two mounting bolts securing the old pump to the engine block.
- Remove the old pump and the old gasket. Thoroughly clean the engine block mounting surface.
- Position the new mounting gasket on the engine block.
- Mount the new fuel pump, ensuring the actuator arm is correctly aligned with the camshaft lobe.
- Hand-tighten the mounting bolts, then torque them to the manufacturer's specification.
- Reconnect the inlet and outlet fuel lines to the correct ports.
- Reconnect the battery, open the fuel valve, and prime the system if necessary.
- Start the engine and carefully inspect for any fuel leaks around the pump and fittings.
Troubleshooting & FAQ
How do I know if my mechanical fuel pump is failing?
Common signs of a failing fuel pump include difficulty starting, engine sputtering at high speeds, stalling, power loss during acceleration, or a noticeable decrease in fuel efficiency. A visual inspection may also reveal fuel leaking from the pump housing.
What is the purpose of the vent tube connection?
The vent tube is a critical safety feature. If the pump's internal diaphragm ruptures, the vent line safely routes any leaking gasoline back to the carburetor, preventing it from accumulating in the engine bay or bilge where it could create a fire hazard.
Is this pump compatible with modern ethanol-blended fuels?
This aftermarket pump is designed for use with standard marine gasoline. While it is built with materials resistant to common fuel additives, always consult your engine's manual and fuel supplier for compatibility with high-concentration ethanol (E15/E85) fuels.
Do I need to apply sealant to the gasket?
No, the included gasket is designed to create a seal on its own. Applying sealant can sometimes cause the gasket to slip or break down prematurely. Always install it on a clean, dry mounting surface.
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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