Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513, 826456, 841640)
Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513, 826456, 841640) 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
Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513...
Product Details
This is an aftermarket Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513), designed for various inboard and stern drive engines from the 1980s–1990s. It is compatible with a wide range of models, including the AQ series, 430, 500, 570, and 740 series, providing reliable cooling performance for legacy systems.
It serves as a direct replacement for multiple OEM and aftermarket part numbers, including Volvo Penta 857451, 856513, and Crusader 40070.
- Installs directly onto the crankshaft with three Allen head bolts.
- Features a durable bronze housing for corrosion resistance in marine environments.
- Equipped with 1-1/4 inch (31.75 mm) inlet and outlet hose connections.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 857451 |
| Volvo Penta | 3860703 |
| Volvo Penta | 856513 |
| Volvo Penta | 826456 |
| Volvo Penta | 841640 |
| Crusader | 40070 |
| Crusader | RA05702 |
| Indmar | 685011 |
| Pleasurecraft | 40070 |
| Pleasurecraft | RA057023 |
| Pleasurecraft | RA057026 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This pump fits a wide range of Volvo Penta engines, stern drives, and transmissions. Verify your model is listed before ordering.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | 3.0 GL/GS | 4-Stroke | 857451 | |
| Volvo Penta | AQ175A | 4-Stroke | 857451 | |
| Volvo Penta | AQ200C/D/F | 4-Stroke | 857451 | |
| Volvo Penta | AQ205A | 4-Stroke | 857451 | |
| Volvo Penta | AQ211A | 4-Stroke | 857451 | |
| Volvo Penta | AQ225C/D/E/F | 4-Stroke | 857451 | |
| Volvo Penta | AQ231A/B | 4-Stroke | 857451 | |
| Volvo Penta | AQ255A/B | 4-Stroke | 857451 | |
| Volvo Penta | AQ260A/B | 4-Stroke | 857451 | |
| Volvo Penta | AQ271A/B/C/D | 4-Stroke | 857451 | |
| Volvo Penta | AQ280A | 4-Stroke | 857451 | |
| Volvo Penta | AQ290A | 4-Stroke | 857451 | |
| Volvo Penta | AQ311A/B | 4-Stroke | 857451 | |
| Volvo Penta | BB225A/B/C | 4-Stroke | 857451 | |
| Volvo Penta | BB231A | 4-Stroke | 857451 | |
| Volvo Penta | BB260A/B/C | 4-Stroke | 857451 | |
| Volvo Penta | BB261A | 4-Stroke | 857451 | |
| Volvo Penta | 430A/B | 4-Stroke | 857451 | |
| Volvo Penta | 431A/B | 4-Stroke | 857451 | |
| Volvo Penta | 432A | 4-Stroke | 857451 | |
| Volvo Penta | 434A | 4-Stroke | 857451 | |
| Volvo Penta | 500A/B | 4-Stroke | 857451 | |
| Volvo Penta | 501A/B | 4-Stroke | 857451 | |
| Volvo Penta | 570A | 4-Stroke | 857451 | |
| Volvo Penta | 571A | 4-Stroke | 857451 | |
| Volvo Penta | 572A | 4-Stroke | 857451 | |
| Volvo Penta | 740A/B | 4-Stroke | 857451 | |
| Volvo Penta | DP-A/A1/A2 | 857451 | Drive model | |
| Volvo Penta | DP-C/C1/C1 1.95/C1 2.30 | 857451 | Drive model | |
| Volvo Penta | DP-D/D1/D1 1.68/D1 1.78/D1 1.95/D1 2.30 | 857451 | Drive model | |
| Volvo Penta | SP-A/A1/A2 | 857451 | Drive model | |
| Volvo Penta | SP-C/C1 | 857451 | Drive model | |
| Volvo Penta | MS3B/C | 857451 | Transmission model | |
| Volvo Penta | MS4A | 857451 | Transmission model | |
| Volvo Penta | 275A | 4-Stroke | 857451 | |
| Volvo Penta | 285A | 4-Stroke | 857451 |
Technical Specs
- Product Type
- Crank-Driven Raw Water Pump
- Installation
- Direct crankshaft mounting with 3 Allen head bolts
- Connection
- 1-1/4 inch (31.75 mm) inlet and outlet ports
- Housing Material
- Bronze
- Housing Color
- Bronze/Copper
- Dimensions
- 2-3/4 inch (69.85 mm) bolt circle
- Weight
- 1.66 kg (3.66 lbs)
- Fitting Type
- Hose connection
- Other Technical Attributes
- Crankshaft-driven design; some applications may require three screw kit P/N 948324
What’s in the Box
- 1 x Sea Water Pump (857451/3860703)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery.
- Close the raw water seacock.
- Place a catch pan under the pump to manage spills.
- Loosen the hose clamps and detach the inlet and outlet hoses.
- Remove the three Allen head bolts that secure the pump to the engine’s crankshaft balancer.
- Gently pry the pump away from the balancer. Do not lose the O-ring if it comes off with the pump.
- Clean the mounting surface on the crankshaft balancer.
- Place the new O-ring (if included) and install the new pump, aligning it carefully.
- Tighten the three Allen bolts evenly to the manufacturer-specified torque.
- Reconnect the water hoses and secure the clamps.
- Open the seacock and reconnect the battery.
- Start the engine and immediately check for any leaks at the pump body and hose connections.
Troubleshooting & FAQ
How do I confirm this pump fits my engine?
Your primary reference should be the part number. If your current pump has a number listed in our Part Number Matrix, this pump is a compatible replacement. You should also check your engine model against the Compatibility table and visually compare your old pump to our product photos.
What are common signs of a failing raw water pump?
Common symptoms include engine overheating at idle or low speeds, a visible water leak from the pump's weep hole or seams, reduced water flow from the exhaust, and a noisy pump bearing. The flexible impeller inside also wears out and can cause reduced performance.
How often should the impeller be inspected or replaced?
As a general rule, inspect the impeller annually and plan to replace it every one to two seasons, depending on usage, water conditions (sandy/silty water causes faster wear), and manufacturer recommendations. A worn or damaged impeller is the most common cause of pump failure.
Is any special maintenance required after installation?
After installation, check for leaks. Regularly inspect the pump and hoses for signs of wear, corrosion, or leaks. If you operate in freezing temperatures, ensure the pump is properly winterized and drained to prevent cracking.
Do I need to buy the separate three-screw kit (P/N 948324)?
This pump attaches with three Allen head bolts. The note regarding kit P/N 948324 applies only to specific engine applications that may require a different bolt length or type. In most cases, you can reuse your existing hardware if it is in good condition. Check your service manual for confirmation.
What is the difference between an OEM and an aftermarket pump?
This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is engineered to meet or exceed OEM specifications for fit, form, and function, offering a high-quality alternative at a better value. Our parts are made in an ISO 9002 certified facility and undergo rigorous quality control.
What are your shipping speeds and costs?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most destinations. Expedited shipping options, where available, will be presented at checkout for an additional fee.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. Should an issue arise, contact our support team with your order number. Returns for unused products in their original packaging are accepted within our standard return window. Please see our full policy page or contact us 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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