Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B)
Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 452...
Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B) is backordered and will ship as soon as it is back in stock.
Product Details
This Marine Impeller Kit – Fits Johnson/Jabsco/Volvo Penta/Yanmar (Replaces 4528-0001, 09-806B) is designed for marine engine raw water/sea water cooling pumps. It serves as a direct replacement for Johnson 09-806B, Jabsco 4528-0001, and several other OEM part numbers across major marine engine manufacturers.
It provides a direct interchange for numerous OEM and aftermarket part numbers, including equivalents from Ancor, CEF, Perkins, Sherwood, and more.
- Features a slotted shaft pin drive for installation.
- Engineered for reliable performance in raw seawater cooling systems.
- The kit includes one impeller and multiple gaskets to fit a variety of pump housings.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| 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 |
| Yanmar | 104211-42070 / 104211-42071 |
Engine & Model Compatibility
Confirm your engine model and original part number in the tables below.
Volvo Penta Applications: This impeller replaces multiple Volvo Penta part numbers used in various raw water cooling pumps.
Yanmar Applications: This impeller replaces Yanmar part numbers 104211-42070 and 104211-42071, commonly found in their marine engines.
Perkins/Kohler Applications: Replaces Perkins 24880272, which is frequently used in cooling systems for Kohler generators powered by Perkins engines like the M20.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Perkins | M20 | 24880272 | Used in KOHLER generators | |||
| Volvo Penta | Various | 803729, 833550, 875807-0, 876554-7, 3586494 | Used in raw water cooling pumps | |||
| Yanmar | Various | 104211-42070, 104211-42071 | Used in raw water cooling pumps | |||
| Onan | 132-0859 | Used in marine generators |
Technical Specs
- Product Type
- Flexible Impeller Kit
- Installation
- Slotted Shaft Pin Drive
- Dimensions
- 39.7 mm diameter × 19.2 mm width
- Shaft Diameter
- 9.5 mm
- Number of Blades
- 6
- Insert Type
- Slotted Shaft Pin Drive
- Weight
- 0.15 lbs (0.068 kg)
- Kit Contents
- Includes impeller and multiple gaskets
What’s in the Box
- 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 Notes
- Disconnect the vessel's battery and close the raw water intake seacock.
- Place absorbent pads below the pump to catch any water spillage.
- Remove the screws holding the pump's end cover plate.
- Gently pry off the old impeller using needle-nose pliers or a dedicated impeller puller.
- Clean any debris or old gasket material from the pump housing interior and cover plate.
- Lubricate the new impeller and housing with a water-based marine lubricant or glycerin.
- Install the new impeller with a slight twisting motion, ensuring the blades bend in the correct direction of pump rotation.
- Place the correct new gasket for your pump model onto the housing.
- Reinstall the end cover plate and tighten the screws evenly.
- Open the seacock, reconnect the battery, and start the engine.
- Immediately check for adequate water flow from the exhaust and inspect the pump for any leaks.
Troubleshooting & FAQ
How do I confirm this impeller fits my pump?
The best way is to match your old part number to a number in our Part Number Matrix. If you cannot find a match, compare the dimensions (diameter, width, shaft size) listed in the Technical Specs to your old impeller. Do not rely on engine model alone.
What are the signs of a failing impeller?
Common symptoms include engine temperatures rising above normal, a noticeable reduction in water flow from the exhaust outlet, and visible cracks, tears, or stiff/brittle blades on the impeller itself during inspection.
How often should I replace my raw water pump impeller?
As a general rule, replace your impeller annually or every 100-200 hours of engine operation, whichever comes first. More frequent replacement may be necessary if you operate in heavily silted or sandy waters.
Is this a direct replacement for Johnson 09-806B-1?
Yes, this kit is a direct aftermarket replacement for both the Johnson 09-806B and 09-806B-1 impellers, manufactured to the same dimensional and material specifications for fit and performance.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Our parts are covered by a 1-year warranty against manufacturing defects under normal use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an Original Equipment Manufacturer (OEM) part.
- Professional installation is recommended for safety and to ensure optimal 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, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By removing middlemen, we offer fair pricing without compromising on materials or quality control.
Payment & Security
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