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Water Pump Impeller Repair Kit – Fits Johnson, Yamaha, Jabsco, Yanmar (Replaces 09-812B-1, 6TA-12457-00, 13554-0001-P, 119773-42600)

Regular price $99.99

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If the return is due to our error or a defective item, we’ll make it right.


Please contact us before returning any item.

Delivery and Shipping

Orders are typically processed within 1–2 business days.


U.S. orders usually arrive within 6–15 days, depending on stock location and destination.


International delivery times may vary due to customs processing.


Tracking information will be provided once your order ships.

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Water Pump Impeller Repair Kit is an essential component for maintaining various marine engines, including Johnson inboard pumps, Yamaha outboards, Jabsco pumps, and Yanmar inboards. It is designed for systems that utilize a 12-spline drive impeller with a 2.25" (57.1mm) diameter, ensuring broad compatibility.

The kit serves as a direct replacement for numerous OEM and aftermarket part numbers, such as Johnson 09-812B-1, Jabsco 13554-0001-P, Yanmar 119773-42600, and many others, providing a reliable alternative for engine maintenance.

  • Installs as a direct replacement for compatible models.
  • Engineered with a durable neoprene (CR) impeller for reliable performance.
  • Features a 12-spline brass hub for secure and lasting engagement.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand Part Number
Johnson 09-812B
Johnson 09-812B-1
Jabsco 13554-0001
Jabsco 13554-0001-P
Yanmar 119773-42600
Yamaha 6TA-12457-00
Sierra 18-3306
Volvo Penta 21951354
Volvo Penta 3842786
Volvo Penta 21213664
Volvo Penta 21951352
CEF 500124
JMP 7136
DJ Pump 09-105-1201
Indmar S685007

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This impeller fits certain Volvo Penta 4.3, 5.0, and 8.1 gas GM engines.

Brand Model OEM Part No.
Volvo Penta 4.3, 5.0, 8.1 Gas GM engines 21213664, 3593660, 3841696, 3588914, 3584350

Compatible with Yanmar 6LP series diesel engines.

Brand Model OEM Part No. Notes
Yanmar 6LP-DTE, 6LP-STE 119773-42600, 192470-42530, 192470-42532 Orbitrade 8-24008 equivalent

Also compatible with various pump and engine models from the following brands.

Brand Model OEM Part No.
Johnson Various Inboard 09-812B, 09-812B-1
Jabsco Various Pumps 13554-0001, 13554-0001-P
Yamaha Various Inboard 6TA-12457-00
Indmar Crank driven sea water pumps S685007
Sierra Various Inboard 18-3306
CEF Various Inboard 500124
JMP Various Inboard 7136
DJ Pump Various Inboard 09-105-1201

Technical Specs

Product Type
Water Pump Impeller Repair Kit
Installation
Direct replacement
Material
Neoprene (CR)
Impeller Drive Type
Spline Drive (12-spline)
Number of Blades
12
Hub Material
Brass
Impeller Diameter
2.25" (57.1mm)
Impeller Width/Depth
1.90" (48.2mm)
Shaft Diameter
5/8" (16mm)

What’s in the Box

  • 1 x Impeller (Replaces Johnson 09-812B-1 / Jabsco 13554-0001-P)

Installation Notes

  1. Disconnect the battery or main power supply to the engine.
  2. Close the water intake seacock to prevent water from entering the vessel.
  3. Locate the sea water pump housing and place a container underneath to catch any spills.
  4. Remove the pump cover plate screws and take off the cover.
  5. Gently grip the old impeller with pliers and pull it straight out of the housing. Note the direction of the old blades.
  6. Clean the inside of the pump housing, removing any debris or old sealant. Check for scoring or wear on the surfaces.
  7. Lightly lubricate the new impeller and the inside of the pump housing with a water-resistant grease or soap.
  8. Install the new impeller by pushing it into the housing while turning it in the direction of engine rotation. Ensure the blades are oriented correctly.
  9. Replace the pump cover gasket and securely fasten the cover plate.
  10. Open the seacock, reconnect power, and start the engine to check for proper water flow and leaks.

Troubleshooting & FAQ

How can I confirm this impeller fits my specific engine?

The best method is to verify your existing part number. Compare it against the extensive list in our Part Number Matrix. Additionally, check the technical specifications—particularly the diameter, width, and shaft size—against your old impeller.

What are common signs of a failing water pump impeller?

Overheating at idle or low speeds is the most common sign. Other indicators include a weak or no water stream from the exhaust outlet, visible cracks or missing blades on the impeller, or a hardened, inflexible texture.

How often should I replace my impeller?

For most recreational boats, it's recommended to inspect the impeller annually and replace it every 1-2 years, regardless of appearance. In commercial or high-hour applications, replacement may be needed more frequently.

Why use a neoprene impeller?

Neoprene (CR) is a robust, flexible rubber compound that is well-suited for use in engine cooling pumps where some contamination from oil or fuel may be present. It offers excellent durability and a long service life in raw water applications.

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. The part is manufactured in an ISO 9002 certified facility and is batch-inspected for consistency and quality.

What are the shipping speed and cost?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations, with expedited options available at checkout where applicable.

What is the warranty and return policy?

This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. If you encounter any issues, please 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. If anything differs—even if your model appears compatible—do not purchase.
  • This is an aftermarket replacement, not an OEM component.
  • Professional installation is recommended for safety and 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 in 5–15 days.
  • Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.

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