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Mechanical Fuel Pump – Fits Volvo Penta AQ120-AQ251 Series
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Mechanical Fuel Pump – Fits Volvo Penta AQ120-AQ251 Series (Replaces 841161, 18-7286)
This aftermarket mechanical fuel pump is designed for a range of 4-cylinder Volvo Penta engines, including the AQ120B through AQ251A series. It provides reliable fuel delivery from the tank to the carburetor and includes a provision for the vent tube.
This is a direct replacement for Volvo Penta part numbers 841161, 841161-3, 867464, and 867465, as well as aftermarket parts Sierra 18-7286, GLM 77011, and Mallory 9-35425.
- Fuel Type: Gasoline
- Installation: Engine Block Mounted
- Included: Fuel pump and mounting gasket
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Volvo Penta | 841161 |
| Volvo Penta | 841161-3 |
| Volvo Penta | 867464 |
| Volvo Penta | 867465 |
| Sierra | 18-7286 |
| GLM | 77011 |
| Mallory | 9-35425 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| 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 Specifications
| Specification | Value |
|---|---|
| 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 |
| Warranty | 1-year (Aftermarket) |
| Other Technical Attributes | Includes provision for vent tube to carburetor |
Package Contents
- 1 x Fuel Pump (841161)
- 1 x Mounting Gasket
Installation Guide
- Safety First: Disconnect the battery and ensure the engine is cool. Work in a well-ventilated area and have a fire extinguisher nearby.
- Locate Pump: Find the existing mechanical fuel pump on the engine block.
- Disconnect Lines: Place a rag under the connections to catch fuel. Carefully disconnect the inlet, outlet, and vent tube fuel lines.
- Remove Old Pump: Unbolt the old pump from the engine block and remove it along with the old gasket.
- Clean Surface: Clean the mounting surface on the engine block to ensure a good seal with the new gasket.
- Install New Pump: Place the new gasket, then install the new fuel pump. Tighten the mounting bolts to the manufacturer's specified torque.
- Reconnect Lines: Securely attach the inlet, outlet, and vent tube lines to the new pump.
- Check for Leaks: Reconnect the battery. Prime the fuel system and start the engine. Carefully inspect all connections for any signs of fuel leaks.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: Check your engine model against the compatible models listed above. You can also verify by matching your existing part number with the ones in our Part Number Cross-Reference table.
Q: What are the common signs of a failing fuel pump?
A: Symptoms include difficulty starting, engine sputtering at high speeds, loss of power, or stalling. A visual inspection may also reveal fuel leaks from the pump housing.
Q: How often should I replace my mechanical fuel pump?
A: Mechanical fuel pumps do not have a fixed replacement interval, but they wear over time. Consider replacement as part of preventative maintenance if the engine is old or if you experience performance issues.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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