Marine Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B)

Marine Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B)

This flexible impeller kit is designed for marine engine raw water and sea water cooling pumps. It is a direct replacement for several OEM part numbers from major marine brands, including Johnson 09-806B and Jabsco 4528-0001.

This kit is a direct replacement for the following part numbers: Ancor 5043, CEF 500100, Jabsco 4528-0001 / 8293-0001 / 22429-0001, Johnson 09-806B / 09-806B-1, Onan 132-0859, Perkins 24880272, Sherwood 9979, Sierra 18-8952, Vetus IMP00501, Volvo Penta 803729 / 833550 / 875807 / 875807-0 / 876554-7 / 3586494, and Yanmar 104211-42070 / 104211-42071.

• Features a Slotted Shaft Pin Drive for installation.
• Kit includes one impeller and multiple gaskets to fit various pump models.
• Directly cross-compatible with numerous OEM and aftermarket part numbers.

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.

Volvo Penta Applications

Yanmar Applications

Perkins/Kohler Applications

Onan Applications

Technical Specifications

Package Contents

• 1 × JMP Flexible Impeller (7001-01)
• 1 × Gasket (GAK0033)
• 1 × Gasket (GAK0034)
• 1 × Gasket (GAK0035)
• 1 × Gasket (GAK0056)

Note: Some applications may not require all gaskets included in the kit.

Installation Guide

1. Ensure the engine is off and the water intake seacock is closed.
2. Locate the raw water pump, which is typically attached to the engine block.
3. Place a catch pan or rags under the pump to collect any spilled coolant.
4. Remove the screws holding the pump cover plate in place. Note the orientation of the screws if they are different lengths.
5. Carefully pry off the cover. An O-ring or paper gasket may be present; be careful not to damage the housing surface.
6. Use impeller pullers or two pairs of pliers to grip the hub of the old impeller and pull it straight out. Avoid tearing the blades.
7. Clean the inside of the pump housing, removing any debris or old impeller fragments. Check for scoring or wear on the housing walls.
8. Apply a small amount of water-resistant grease or dish soap to the inside of the pump housing and to the new impeller.
9. Squeeze the new impeller and bend the blades in the direction of the pump's rotation as you insert it into the housing.
10. Install the new gasket or O-ring provided in the kit.
11. Reinstall the pump cover plate and tighten the screws in a star pattern to ensure even pressure.
12. Re-open the seacock, start the engine, and immediately check for leaks and proper water flow from the exhaust.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my engine?

A: The best way to ensure compatibility is to match your existing part number to our cross-reference list. This kit replaces Johnson 09-806B, Jabsco 4528-0001, Volvo Penta 875807, Yanmar 104211-42070, and others. Please check the "Part Number Cross-Reference" table and "Compatible Engine Models" section.

Q: What are the signs of a worn or failing impeller?

A: Common signs include engine overheating, reduced water flow from the exhaust outlet, and visible cracks or missing blades on the impeller itself. We recommend inspecting the impeller annually.

Q: How often should I replace my water pump impeller?

A: Most marine engine manufacturers recommend replacing the raw water impeller every one to two years, or every 100-200 hours of operation, whichever comes first. Refer to your engine's service manual for specific intervals.

Q: Why does the kit include multiple gaskets?

A: This impeller is used in a wide variety of pump housings across different brands like Volvo Penta, Yanmar, and Jabsco. The included gaskets (GAK0033, GAK0034, GAK0035, GAK0056) ensure you have the correct one for your specific pump model. You will only use one gasket for your 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.