Johnson F8B Impeller – Fits Volvo Penta Diesel Engines (Replaces 09-1029B, 875736-1)
Johnson F8B Impeller – Fits Volvo Penta Diesel Engines (Replaces 09-1029B, 875736-1) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Johnson F8B Impeller – Fits Volvo Penta Diesel Engines (Replaces 09...
Product Details
The Johnson F8B Impeller – Fits Volvo Penta Diesel Engines (Replaces 09-1029B, 875736-1) is a direct-fit marine engine cooling component for a wide range of Volvo Penta diesel engines, including the TAMD, TMD, AQD, and MD series manufactured between 1965 and 2013. Its primary function is to draw raw water into the engine's cooling system to maintain optimal operating temperatures.
This impeller serves as a direct cross-reference for multiple part numbers, including Johnson 09-1029B, Volvo Penta 875736-1, Jabsco 836-0001, and Sierra 18-3078, offering a reliable alternative to OEM parts.
- Designed for simple installation in F8B series raw water pumps.
- Made from a durable neoprene compound for dependable performance in seawater applications.
- The kit includes the impeller, necessary gaskets/O-rings, and a glycerin packet for lubrication during installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Johnson | 09-1029B |
| Johnson | 09-1029B-9 |
| Johnson | 09-1029B-10 |
| Volvo Penta | 875660-3 |
| Volvo Penta | 875736-1 |
| Volvo Penta | 875736 |
| Volvo Penta | 21430184 |
| Volvo Penta | 21730344 |
| Jabsco | 836-0001 |
| Jabsco | 17935-0001 |
| Sierra | 18-3078 |
| Oberdorfer | 7054 |
| Cummins | 160596 / 166758 / 21601R / 556540 / 556850 |
| Detroit | 5193553 |
| Perkins | 460027 |
| Caterpillar | 1L4774 |
Engine & Model Compatibility
Confirm your engine model and year in the tables below to ensure proper fitment.
This impeller is known to fit a wide range of Volvo Penta diesel engines. Please verify your specific model against this list.
| Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| AD40B | 875736-1 | |||
| AQAD40A | 110–148 | 1980–1985 | 875736-1 | |
| AQAD40B | 165 | 1982–1986 | 875736-1 | |
| AQD40A | 124 | 1977–1985 | 875736-1 | |
| D100BHC | 875736-1 | |||
| D100BRC | 875736-1 | |||
| D11A-A | 670 | 2007–2008 | 875736-1 | |
| D11A-B | 670 | 2008–2009 | 875736-1 | |
| D11A-C | 670 | 2009–2010 | 875736-1 | |
| D11A-D | 670 | 2010–2013 | 875736-1 | |
| D11A-D (IPS) | 600 | 2010–2013 | 875736-1 | |
| D11A-E | 670 | 2012–2013 | 875736-1 | |
| D11A-E (IPS) | 600 | 2012–2013 | 875736-1 | |
| D11B1-A MP | 725 | 2013-Up | 875736-1 | |
| D11B2-A MP (IPS) | 725 | 2013-Up | 875736-1 | |
| MD100A | 133–182 | 1965–1970 | 875736-1 | |
| MD100B | 150–189 | 1969–1984 | 875736-1 | |
| MD100B-CC | 150–189 | 1969–1984 | 875736-1 | |
| MD120A | 175–220 | 1970–1980 | 875736-1 | |
| MD120AK | 175–220 | 1970–1980 | 875736-1 | |
| MD40A | 72–85 | 1976–1985 | 875736-1 | |
| TAMD102A | 320–360 | 1991–2000 | 875736-1 | |
| TAMD102D | 428–470 | 1993–2000 | 875736-1 | |
| TAMD120A | 302–356 | 1972–1980 | 875736-1 | |
| TAMD120AK | 302–356 | 1972–1980 | 875736-1 | |
| TAMD120B | 340–400 | 1980–1983 | 875736-1 | |
| TAMD120B-CC | 340–400 | 1980–1983 | 875736-1 | |
| TAMD121C | 408 | 1983–1986 | 875736-1 | |
| TAMD121D | 95–422 | 1983–1988 | 875736-1 | |
| TAMD122A | 183–400 | 1988–2002 | 875736-1 | |
| TAMD122C | 173–450 | 1988–1989 | 875736-1 | |
| TAMD122D | 432–462 | 1989–1996 | 875736-1 | |
| TAMD122P-A | 530–600 | 1995–2002 | 875736-1 | |
| TAMD122P-B | 600 | 1996–1999 | 875736-1 | |
| TAMD122P-C | 530–610 | 1996–2001 | 875736-1 | |
| TAMD40A | 110–148 | 1980–1985 | 875736-1 | |
| TAMD40B | 165 | 1983–1986 | 875736-1 | |
| TAMD61A | 306 | 1986–1995 | 875736-1 | |
| TAMD62A | 330 | 1992–1994 | 875736-1 | |
| TAMD71A | 357 | 1986–1994 | 875736-1 | |
| TAMD71B | 218–350 | 1989–2000 | 875736-1 | |
| TAMD72A | 430 | 1991–1995 | 875736-1 | |
| TAMD72P-A | 430 | 1995–1997 | 875736-1 | |
| TAMD72WJ-A | 450 | 1993–1997 | 875736-1 | |
| TAMD73P-A | 350 | 1997–1998 | 875736-1 | |
| TAMD73WJ-A | 450 | 1997–1999 | 875736-1 | |
| TD100AHC | 130 | 1993–1994 | 875736-1 | |
| TD100ARC | 130 | 1994–2003 | 875736-1 | |
| TD100CHC | 110 | 1995–2001 | 875736-1 | |
| TD100CRC | 110 | 1994–2003 | 875736-1 | |
| TD120AHC | 230 | 1992–1993 | 875736-1 | |
| TD120AHC/CC | 230 | 1993–1996 | 875736-1 | |
| TD120ARC | 230 | 1995–2003 | 875736-1 | |
| TD120ARC/CC | 121–200 | 1976–1978 | 875736-1 | |
| TD120BHC | 140–230 | 1978–1983 | 875736-1 | |
| TD120BRC | 152–250 | 1983–1987 | 875736-1 | |
| TD121CHC | 209–300 | 1983–1987 | 875736-1 | |
| TD121CRC | 357 | 1986–1994 | 875736-1 | |
| TMD100A | 195–264 | 1965–1983 | 875736-1 | |
| TMD100A-CC | 875736-1 | |||
| TMD100AK | 195–264 | 1965–1983 | 875736-1 | |
| TMD100C | 196–272 | 1983–1988 | 875736-1 | |
| TMD102A | 141–272 | 1988–2000 | 875736-1 | |
| TMD120A | 230–271 | 1970–1982 | 875736-1 | |
| TMD120AK | 875736-1 | |||
| TMD120B | 287–326 | 1982–1983 | 875736-1 | |
| TMD121C | 223–340 | 1983–1988 | 875736-1 | |
| TMD122A | 300–320 | 1988–2000 | 875736-1 | |
| TMD40A | 91–124 | 1976–1985 | 875736-1 | |
| TMD40B | 128–136 | 1982–1986 | 875736-1 | |
| TMD40C | 136 | 1983–1986 | 875736-1 |
Technical Specs
- Product Type
- Marine Engine Cooling Impeller
- Installation
- Direct replacement for F8B series water pumps
- Material
- Neoprene
- Dimensions
- Diameter: 95 mm (3.75 in), Width: 63 mm (2.5 in)
- Shaft Diameter
- 25.4 mm (1 in)
- Number of Blades
- 9
- Drive Type
- Spline hub
- Color
- Black
- Package Includes
- Impeller, gaskets/O-rings, lubricating glycerin packet
- Other Technical Attributes
- Designed for raw water (sea water) pumps on marine diesel engines
What’s in the Box
- 1 x Impeller F8B (Replaces 09-1029B)
- 1 x Gasket/O-ring Set
- 1 x Lubricating Glycerin Packet
Installation Notes
- Shut off the engine, close the raw water seacock, and allow the system to cool completely.
- Locate the raw water pump and remove the cover plate screws to access the old impeller.
- Carefully remove the old impeller. Using impeller pullers or two flathead screwdrivers can help, but avoid gouging the pump housing.
- Clean the inside of the pump housing and inspect it for scoring, debris, or significant wear.
- Install the new gasket or O-ring on the pump cover. Ensure the sealing surfaces are clean.
- Lightly coat the inside of the pump housing and the new impeller with the included glycerin lubricant.
- Insert the new impeller with a twisting motion, bending the blades in the direction of the pump's natural rotation.
- Secure the cover plate and tighten the screws evenly in a star pattern to ensure a proper seal.
- Open the raw water seacock, start the engine, and immediately check for adequate water flow from the exhaust and look for any leaks around the pump cover.
Troubleshooting & FAQ
How do I confirm this impeller fits my engine?
The best method is to match your existing part number to the list in our "Part Number Matrix." You can also verify your model in the "Engine & Model Compatibility" table. If you are still unsure, we strongly recommend comparing the dimensions of our impeller (listed under Technical Specs) with your old part before purchasing.
What are the signs of a worn or failing impeller?
Common symptoms include the engine running hotter than normal or overheating, reduced water flow from the exhaust outlet, visible cracks on the impeller blades, missing blades, or rubber that feels stiff and brittle.
How often should I replace my impeller?
As a rule of thumb, impellers should be inspected annually and replaced every one to two years, depending on engine hours and operating conditions. If the boat is operated in silty water or the pump has ever been run dry, more frequent replacement is advised.
What happens if I install the impeller with the blades bent the wrong way?
Most raw water pumps are designed so the impeller blades will automatically flip to the correct orientation upon the first rotation of the engine. However, for best results and to reduce initial stress, it is recommended to pre-bend the blades in the correct direction during installation.
Is this an OEM part or an aftermarket replacement?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most locations; expedited options will appear at checkout if they are available for your region.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and 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 purchasing. If anything differs—even if your model appears on the compatibility list—do not purchase.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component. Brand names and part numbers are used for reference purposes only.
- Professional installation is highly recommended for safety and to ensure optimal performance. Incorrect installation can lead to engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — With partners worldwide, we offer free standard delivery to most regions, typically arriving in 5–15 days.
- Manufacturer-Direct Value — Our direct sourcing model allows us to provide premium parts at a fair price, without compromising on materials or quality control.
Payment & Security
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