Johnson Pump 09-806B Impeller Kit – Replaces Volvo Penta 875807-0, 3586498 and Yanmar 104211-42070
Johnson Pump 09-806B Impeller Kit – Replaces Volvo Penta 875807-0, 3586498 and Yanmar 104211-42070 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Johnson Pump 09-806B Impeller Kit – Replaces Volvo Penta 875807-0, ...
Johnson Pump 09-806B Impeller Kit – Replaces Volvo Penta 875807-0, 3586498 and Yanmar 104211-42070 is backordered and will ship as soon as it is back in stock.
Product Details
This flexible Johnson Pump 09-806B impeller kit is a replacement service component for raw-water and seawater cooling pumps. It is used in selected Volvo Penta diesel applications and is cross-referenced with several established marine-parts numbers, including Volvo Penta 875807-0 and 3586498, Jabsco 4528-0001, Sherwood 9979K, and Yanmar 104211-42070.
The cataloged impeller is a neoprene component measuring approximately 2-1/4 inches in diameter by 1-1/4 inches in side width. Always compare the existing impeller, pump model, dimensions, drive style, and manufacturer reference before ordering.
- Flexible neoprene impeller for marine raw-water cooling pumps.
- Supplied as an impeller kit with a gasket according to the referenced catalog application.
- Designed for service replacement where the listed manufacturer or aftermarket reference matches.
- Do not operate a raw-water pump without water flow; dry running can quickly damage the impeller.
Part Number Matrix
The following references are cataloged interchange numbers for this impeller application. They are not a guarantee of fit for every pump carrying the same brand name.
| Brand | Part Number | Reference Type |
|---|---|---|
| Johnson Pump | 09-806B | Manufacturer reference |
| Volvo Penta | 875807-0 | OEM reference |
| Volvo Penta | 3586498 | OEM reference |
| Jabsco | 4528-0001 | Aftermarket reference |
| Sherwood Pump | 9979K | Aftermarket reference |
| Yanmar | 104211-42070 | OEM reference |
Engine & Model Compatibility
Fitment must be confirmed by matching the complete engine and pump application. The available catalog references this impeller kit for the following Volvo Penta applications:
| Brand | Engine or Pump Application | Conditions | OEM Reference |
|---|---|---|---|
| Volvo Penta | D40 | Confirm pump configuration | 875807-0 / 3586498 |
| Volvo Penta | AD40B | Confirm pump configuration | 875807-0 / 3586498 |
| Volvo Penta | AQAD40A | Confirm pump configuration | 875807-0 / 3586498 |
| Volvo Penta | AQAD40B | Confirm pump configuration | 875807-0 / 3586498 |
| Volvo Penta | TAMD40A | Confirm pump configuration | 875807-0 / 3586498 |
| Volvo Penta | TAMD40B | Confirm pump configuration | 875807-0 / 3586498 |
Yanmar 104211-42070 is listed as a corresponding manufacturer reference. Because the available source does not provide a complete Yanmar engine model, year, serial-number, or pump-configuration list for this reference, verify the old part number and dimensions before purchase.
Technical Specs
- Product Type
- Flexible neoprene impeller kit for a marine raw-water or seawater pump
- Material
- Neoprene
- Impeller Diameter
- Approximately 2-1/4 inches
- Side Width
- Approximately 1-1/4 inches
- Kit Configuration
- Impeller with gasket as listed for the corresponding application
- Drive and Blade Details
- Confirm against the original impeller and pump before installation; the available catalog does not establish a universal drive-style specification for every application.
What's in the Box
- 1 x Flexible neoprene impeller
- 1 x Pump gasket
Lubricant, installation tools, pump cover hardware, and an instruction manual are not confirmed as included. Package contents may vary by supplier packaging.
Installation Notes
- Shut down the engine and close the raw-water intake seacock where fitted.
- Remove the raw-water pump cover and retain the hardware in a clean location.
- Remove the old impeller without damaging the pump housing, cover plate, shaft, or seal surfaces.
- Clean the housing and cover plate, removing gasket residue and debris.
- Compare the replacement impeller with the old part for diameter, width, hub, drive, and blade configuration.
- Fit the new gasket and install the impeller with a suitable water-compatible assembly lubricant. Do not use petroleum-based grease unless specifically approved by the pump manufacturer.
- Install the cover plate and tighten the fasteners evenly without overtightening.
- Reopen the seacock before starting the engine.
- After startup, check immediately for water flow, leaks, abnormal noise, and rising engine temperature.
Troubleshooting & FAQ
How do I confirm that this impeller fits my engine?
Match your existing manufacturer part number first, then verify the complete engine model, pump model, impeller diameter, side width, hub, and drive arrangement. A model-family match alone is not sufficient because marine pumps may differ by configuration or production range.
Which manufacturer references are associated with this impeller?
The available catalog references include Johnson Pump 09-806B, Volvo Penta 875807-0 and 3586498, Jabsco 4528-0001, Sherwood 9979K, and Yanmar 104211-42070.
Is this an impeller or a complete water pump?
This is an impeller kit for servicing a compatible raw-water or seawater pump. It is not a complete pump assembly and does not include the pump housing, cover, shaft, seal, or mounting hardware unless specifically stated in the package contents.
Can I run the pump dry with this impeller?
No. A raw-water pump impeller relies on water for cooling and lubrication. Even brief dry running can overheat and damage the blades.
When should a raw-water impeller be replaced?
Inspect the impeller regularly and replace it when blades are cracked, hardened, permanently bent, damaged, or missing. Follow the engine or pump manufacturer's maintenance interval, especially when operating in sandy, silty, or contaminated water.
Is this an OEM component?
This listing is for a replacement impeller kit. Johnson Pump, Volvo Penta, Jabsco, Sherwood, and Yanmar references are provided for identification and compatibility checking; brand references do not mean that this item is manufactured by every brand listed.
Safety & Important Information
- Verify the old part number and all dimensions before ordering.
- Keep engine model, year, serial number, pump configuration, and drive arrangement together when confirming fitment.
- Never run the engine with the raw-water intake closed or the pump running dry.
- Inspect the pump housing, cover plate, shaft, seal, and gasket surfaces during installation.
- Professional installation is recommended when the cooling system or pump condition is uncertain.
About Sea Sierra
- Marine Replacement Parts — Practical service components for maintaining vessel cooling systems.
- Compatibility-Focused Listings — Manufacturer references and application details are provided to support careful part matching.
- Support for Service Work — Replace worn cooling-system components before loss of water flow causes overheating.
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