Raw Water Pump – Fits Yanmar 3JH & 4JH Series (Replaces 129670-42513)
Raw Water Pump – Fits Yanmar 3JH & 4JH Series (Replaces 129670-42513) 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
Raw Water Pump – Fits Yanmar 3JH & 4JH Series (Replaces 129670-...
Product Details
This is an aftermarket Raw Water Pump for Yanmar 3JH & 4JH Series engines, designed as a direct-fit replacement for cooling systems on Yanmar Marine 3JH3 and 4JH3/4JH4 series diesel engines manufactured between 2002–2011.
This pump serves as a direct replacement and interchange for Yanmar part 129670-42513, which supersedes 129670-42500, 129670-42501, 129670-42510, 129670-42511, and 129670-42512. It also cross-references with Johnson 10-13328-04, 10-13328-02, and JMP JPR-YM04JHA.
- Engine-driven pump for reliable seawater circulation.
- Features a durable bronze housing and 90-degree elbow hose ports for secure connections.
- Includes the necessary drive gear for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Yanmar | 129670-42500 | 129670-42513 |
| Yanmar | 129670-42501 | 129670-42513 |
| Yanmar | 129670-42510 | 129670-42513 |
| Yanmar | 129670-42511 | 129670-42513 |
| Yanmar | 129670-42512 | 129670-42513 |
| Johnson | 10-13328-04 | |
| Johnson | 10-13328-02 | |
| JMP | JPR-YM04JHA |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This pump is confirmed to fit a wide range of Yanmar 3JH and 4JH series engines.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Yanmar | 3JH3E | 4-Stroke | 129670-42513 |
| Yanmar | 3JH3E (EPA) | 4-Stroke | 129670-42513 |
| Yanmar | 3JH3CE | 4-Stroke | 129670-42513 |
| Yanmar | 3JH3E-YEU-E | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3E | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3CE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3CE1 | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-TE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-TE-YEU | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-TCE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-DTE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-DTE(YEU) | 4-Stroke | 129670-42513 |
| Yanmar | 4JH3-THE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH4-TE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH4-THE | 4-Stroke | 129670-42513 |
| Yanmar | 4JH4-HTE1 | 4-Stroke | 129670-42513 |
| Yanmar | 4JH80 | 4-Stroke | 129670-42513 |
| Yanmar | 4JH110 | 4-Stroke | 129670-42513 |
Technical Specs
- Product Type
- Raw Water / Seawater Engine Cooling Pump
- Installation
- Engine-driven
- Connection
- Hose port type, 90-degree elbow
- Housing Material
- Bronze
- Impeller Material
- Neoprene
- Shaft Type
- Marine grade non-magnetic (3X series)
- Dimensions
- 16.0cm x 16.0cm x 20.5cm
- Weight
- 2.5 kg (5.5 lbs)
- Drive Gear
- Included
- Seals
- O-Ring end covers, long-life mechanical seal
What’s in the Box
- 1 x Raw Water Pump (Replaces 129670-42513)
- 1 x Drive Gear (included with pump assembly)
Installation Notes
- Close the raw water seacock before beginning work.
- Place a suitable container under the pump to catch any spilled coolant.
- Loosen the hose clamps and carefully detach the inlet and outlet hoses from the pump.
- Remove the pump's mounting bolts, noting their length and position.
- Gently remove the old pump from the engine. You may need to lightly tap it to break the gasket seal.
- Thoroughly clean the engine mounting surface and remove any old gasket material.
- Apply a new mounting gasket (Yanmar 129150-01881, sold separately) to the engine block.
- Position the new pump, install the mounting bolts, and tighten them evenly to the manufacturer's specified torque.
- Reconnect the hoses and securely tighten the clamps.
- Open the seacock, start the engine, and immediately check for any leaks around the pump and hose connections.
Troubleshooting & FAQ
How do I know if this pump fits my specific engine?
This pump fits Yanmar 3JH and 4JH series engines. The best way to confirm is to match your old part number to the numbers listed in our Part Number Matrix or check your engine model against the Compatibility table. If your part number or model is listed, it will fit.
What are the signs of a failing raw water pump?
Common signs include engine overheating, reduced water flow from the exhaust, visible water leaks from the pump seals (weep holes), or a noisy pump bearing. If you notice any of these symptoms, inspect your pump and impeller immediately.
How often should the neoprene impeller be replaced?
For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, depending on usage and water conditions. Always replace the impeller if it shows signs of cracking, brittleness, or visible wear on the blades.
Is a new gasket required for installation?
Yes, a new mounting gasket (Yanmar Part No. 129150-01881) is required to ensure a proper seal between the pump and the engine. This gasket is not included with the pump and must be purchased separately.
What's the difference between OEM and aftermarket?
This listing is an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to the same specifications with comparable or superior materials in an ISO 9002 certified facility. Each batch is inspected to ensure quality and performance.
How fast is shipping?
We ship worldwide quickly. Typical transit time is 5–15 days for standard delivery. Expedited shipping options are available at checkout for most regions. All orders are processed promptly to get your parts to you as fast as possible.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted for unused items in their original condition within our standard return window. Please see our policy page for full details.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
- Professional installation is highly recommended for safety, proper function, and to prevent 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 — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — Our direct-sourcing model ensures fair pricing without compromising on materials, quality control, or performance.
Payment & Security
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