Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513)

Raw Water Pump – Fits Volvo Penta 3.0-7.4L (Replaces 857451, 856513)

This crankshaft-driven raw water pump is designed for a wide range of Volvo Penta inboard and stern drive engines, including various 3.0L to 7.4L models from the 1980s and 1990s. It is a direct fit for popular series such as the AQ, 430, 500, 570, and 740.

This unit serves as a direct replacement for Volvo Penta part numbers 857451, 3860703, 856513, 826456, and 841640. It also cross-references with Crusader (40070, RA05702), Indmar (685011), and Pleasurecraft (40070, RA057023, RA057026).

• Features a durable bronze housing for excellent corrosion resistance.
• Mounts directly to the crankshaft pulley using three Allen head bolts.
• Equipped with 1-1/4 inch (31.75 mm) hose connection ports for both inlet and outlet.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Sea Water Pump (857451/3860703)

Installation Guide

1. Disconnect the boat's battery and close the raw water intake valve (seacock).
2. Loosen the hose clamps and carefully detach the inlet and outlet water hoses from the pump.
3. Remove the three Allen head bolts that secure the pump assembly to the engine's crankshaft pulley.
4. Gently pull the old pump straight off the crankshaft. Be prepared for some water to spill.
5. Clean the mounting surface on the crankshaft pulley, ensuring it is free of dirt or old gasket material.
6. Align the new pump with the mounting holes and slide it into place on the crankshaft.
7. Install and evenly tighten the three Allen head bolts to secure the pump.
8. Reconnect the inlet and outlet hoses and tighten the hose clamps securely.
9. Open the raw water seacock.
10. Reconnect the battery.
11. Start the engine and immediately check the pump and hose connections for any leaks.
12. Confirm that water is flowing properly through the cooling system and out the exhaust.

Troubleshooting & FAQ

Q: How do I confirm this pump fits my Volvo Penta engine?
A: First, check your engine model against the compatible models list provided on this page. This pump is designed for a wide range of Volvo Penta 3.0L to 7.4L engines, primarily from the 1980s–1990s. More importantly, verify that it matches the OEM part number for your specific engine (e.g., 857451, 856513). Visually confirm that your current pump is mounted on the crankshaft and has a 2-3/4 inch bolt circle.

Q: What are the main signs that a raw water pump is failing?
A: The most common signs include the engine running hotter than normal or overheating, a noticeable reduction in water flowing out of the exhaust, visible water leaks from the pump body or weep holes, and unusual noises from the pump area. A damaged or worn impeller is a frequent cause of failure.

Q: My old pump is broken. Does this kit include the mounting screws?
A: This package contains the pump assembly only. While you can often reuse your existing bolts, some applications may require a separate three-screw kit (Volvo Penta P/N 948324). Please inspect your original bolts for wear or damage before installation.

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.