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Mechanical Fuel Pump – Fits Volvo Penta AQ Series (Replaces 841161, 18-7286)
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Mechanical Fuel Pump – Fits Volvo Penta AQ Series (Replaces 841161, 18-7286)
This mechanical fuel pump is designed for a wide range of Volvo Penta gasoline inboard and sterndrive engines, specifically fitting 4-cylinder models in the AQ120B through AQ171C series manufactured from the early 1970s to the mid-1990s.
It serves as a direct replacement for several OEM and aftermarket part numbers, ensuring compatibility and reliable performance for engine restoration and maintenance.
- Installation Type: Mechanical (Engine-Driven)
- Compatible Fuel: Gasoline
- Included Components: Comes with the required mounting gasket for a complete installation.
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 | 77011 |
| Sierra | 18-7286 |
| FridayParts | 18-7286 |
| FridayParts | 841161-3 |
| FridayParts | 9-35425 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Volvo Penta | AQ120B | 4-Stroke | 841161 |
| Volvo Penta | AQ125A, AQ125B | 4-Stroke | 841161 |
| Volvo Penta | AQ131A, AQ131B, AQ131C, AQ131D | 4-Stroke | 841161 |
| Volvo Penta | AQ140A | 4-Stroke | 841161 |
| Volvo Penta | AQ145A, AQ145B | 4-Stroke | 841161 |
| Volvo Penta | AQ151A, AQ151B, AQ151C | 4-Stroke | 841161 |
| Volvo Penta | AQ171A, AQ171C | 4-Stroke | 841161 |
| Volvo Penta | BB140A, BB145A | 4-Stroke | 841161 |
| Volvo Penta | 230A, 230B | 4-Stroke | 841161 |
| Volvo Penta | 250A, 250B, 251A | 4-Stroke | 841161 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Mechanical Fuel Pump |
| Installation | Mechanical (Engine-Driven) |
| Fuel Type | Gasoline |
| Housing Material | Metal |
| Housing Color | Silver/Chrome |
| Warranty | 1 Year (FridayParts) |
| Other Technical Attributes | Includes mounting gasket |
Package Contents
- 1 x Fuel Pump (841161)
- 1 x Mounting Gasket
Installation Guide
- Safety First: Disconnect the battery and work in a well-ventilated area away from any open flames or sparks.
- Relieve Pressure: Carefully relieve the pressure from the fuel system according to your engine's service manual.
- Disconnect Lines: Place a rag under the fuel pump to catch any spills and disconnect the inlet and outlet fuel lines.
- Remove Old Pump: Unscrew the mounting bolts holding the pump to the engine block. Remove the old pump and the old gasket.
- Clean Surface: Thoroughly clean the engine's mounting surface to ensure a clean, flat base for the new gasket.
- Install New Pump: Place the new gasket onto the engine block, followed by the new fuel pump.
- Secure Pump: Hand-tighten the mounting bolts, then torque them to the manufacturer's specified value. Do not overtighten.
- Reconnect Lines: Securely reattach the inlet and outlet fuel lines to the new pump.
- Prime System: Reconnect the battery. Prime the fuel system by cranking the engine a few times without starting it.
- Final Check: Start the engine and carefully inspect the pump and all connections for any signs of fuel leaks.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: First, check the 'Compatible Engine Models' table to see if your specific model (e.g., AQ125B, AQ151A) is listed. Second, verify that your existing part number matches one of the numbers in our 'Part Number Cross-Reference' section, such as Volvo Penta 841161 or Sierra 18-7286.
Q: What are the common signs of a failing mechanical fuel pump?
A: Symptoms often include the engine sputtering, especially at high speeds, experiencing a noticeable loss of power, having difficulty starting, or stalling unexpectedly. You might also discover fuel leaks coming from the pump body or its fittings.
Q: Is a mounting gasket included with this pump?
A: Yes, a new mounting gasket is included in the package. This is critical for ensuring a proper, leak-free seal between the pump and the engine block.
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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