Impeller Repair Kit for Johnson Pump Applications – Replaces 09-812B-1
Impeller Repair Kit for Johnson Pump Applications – Replaces 09-812B-1 is backordered and will ship as soon as it is back in stock.
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Impeller Repair Kit for Johnson Pump Applications – Replaces 09-812B-1
Impeller Repair Kit for Johnson Pump Applications – Replaces 09-812B-1 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket impeller repair kit is intended for selected raw-water pump applications using the Johnson Pump reference 09-812B-1. It is supplied as a service kit for replacing a worn or damaged marine engine cooling-system impeller.
Fitment depends on the exact pump, housing, shaft configuration, and engine application. Confirm the part number and the physical design of your existing impeller before ordering. The reference number is associated with Johnson Pump applications in the available catalog material; it should not be treated as universal fitment for every Johnson, Jabsco, Indmar, Yanmar, Volvo, or boat model.
- Aftermarket replacement for selected raw-water pump impeller applications.
- Designed for routine cooling-system service when the pump and impeller specifications match.
- Kit format includes the impeller and the listed sealing components.
- Verify dimensions, spline or shaft connection, blade count, and cover-plate seal before installation.
Part Number References
The following numbers are reference leads supplied with this listing. Cross-reference them against the number stamped or listed for your pump; number co-occurrence alone does not confirm fitment.
| Brand or Source | Reference Number | Use |
|---|---|---|
| Johnson Pump | 09-812B-1 | Primary replacement reference |
| Johnson Pump | 09-812B | Related reference shown for identification |
| Jabsco | 17935-0001-P | Listing cross-reference; verify before purchase |
| Sierra | 18-3306 | Listing cross-reference; verify before purchase |
| Indmar | S685007 / 685007 | Listing cross-reference; verify pump configuration |
| Yanmar | 119773-42600 / 119773-42600-01 | Listing cross-reference; verify application |
| Pleasurecraft | RP061018 | Listing cross-reference; verify application |
| Mallory | 9-45704 | Listing cross-reference; verify application |
| Yamaha | 6TA-12457-00 | Listing cross-reference; verify application |
Application and Compatibility
This kit is for selected marine raw-water pump applications rather than all engines sold under the brands listed below. The available catalog evidence identifies Johnson Pump 09-812B-1 in connection with a Volvo cooling-system application, including Volvo applications described as 1998 and earlier. This information is a catalog lead and must be checked against the complete pump and engine identification.
| Application | Reference | Compatibility Guidance |
|---|---|---|
| Johnson Pump | 09-812B-1 / 09-812B | Confirm the pump model, housing, shaft, and impeller dimensions. |
| Volvo cooling-system applications | Catalog association with Johnson Pump 09-812B-1 | Catalog text identifies Volvo applications described as 1998 and earlier; verify the exact engine and pump assembly. |
| Jabsco, Indmar, Yanmar, Pleasurecraft, Mallory, and Yamaha applications | See reference table | Use the listed numbers only as cross-reference leads. Do not rely on brand or boat model alone. |
Technical Specifications
- Product Type
- Raw-water pump impeller repair kit
- Product Construction
- Neoprene impeller with metal insert, as described for this listing
- Installation
- Replacement service part for a matching pump assembly
- Fitment Basis
- Part-number and physical-dimension comparison required
- Primary Reference
- Johnson Pump 09-812B-1
Exact dimensions, blade count, spline configuration, shaft size, and seal profile should be compared with the original part and pump manufacturer information before installation. Do not assume that a similar-looking impeller is interchangeable.
What’s in the Box
- 1 x Replacement impeller
- 1 x O-ring
- 1 x Gasket
Package contents are based on the kit configuration described for this listing. Inspect the received parts before disassembly and confirm that the included seal matches your pump cover.
Installation Notes
- Switch off the engine, disconnect the battery where appropriate, and prevent accidental starting.
- Close the raw-water intake seacock before opening the pump.
- Place an absorbent pad below the pump to catch residual water.
- Remove the pump-cover fasteners and carefully remove the cover plate.
- Note the original impeller blade orientation and remove the old impeller with suitable pliers or an impeller puller.
- Clean the pump cavity and remove any broken blade fragments or debris.
- Lightly lubricate the replacement impeller with a lubricant approved for the pump and cooling-system application.
- Install the impeller in the correct rotational orientation for the pump.
- Fit the new gasket or O-ring supplied for the matching cover design.
- Reinstall the cover evenly and tighten the fasteners to the pump manufacturer's specification.
- Open the seacock, reconnect the battery if disconnected, and check for leaks and proper cooling-water flow after starting.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Start by matching your existing pump or impeller number to the reference table. Then compare the impeller diameter, width, blade count, shaft or spline connection, insert, and cover seal. Engine brand and boat model alone are not sufficient to confirm fitment.
What are common signs of a worn impeller?
Common symptoms include reduced cooling-water flow, engine overheating, damaged or missing blades, cracking, hardening, or pieces of impeller material found in the cooling passages. Other cooling-system faults can cause similar symptoms, so inspect the complete system.
How often should a raw-water impeller be replaced?
Inspect the impeller according to the engine or pump manufacturer's maintenance schedule. Service intervals vary with operating hours, storage conditions, and exposure to saltwater, sand, or debris. Replace it sooner if it shows cracking, distortion, hardening, or missing blades.
Can this kit correct an overheating engine?
A damaged raw-water impeller can contribute to overheating, but overheating may also result from a blocked intake, damaged pump housing, thermostat problems, restricted passages, or other faults. Diagnose the complete cooling system before returning the engine to service.
Is this an OEM part?
No. This is an aftermarket replacement kit. The listed manufacturer and reference numbers are provided for identification and cross-reference only.
Is professional installation recommended?
Impeller replacement is a routine service operation for experienced boat owners, but access and pump design vary. Use the manufacturer's service procedure and seek professional assistance if the pump configuration, installation direction, or seal arrangement is uncertain.
Safety & Important Information
- Verify the exact pump and impeller application before purchase.
- Do not operate the engine with the raw-water seacock closed.
- Inspect the pump housing, cover plate, wear surfaces, and cooling passages whenever an impeller fails.
- Do not install the part if the dimensions, shaft connection, blade design, or seal profile differs from the original.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Service components for routine boat and engine maintenance.
- Application-Focused Listing — Reference numbers and compatibility guidance are provided to support careful part comparison.
- Fitment First — Always compare the original part and pump specifications before installation.
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