Yamaha Water Pump Repair Kit – Fits Yamaha 250HP F250/F250B Outboards (Replaces 6P2-W0078-00-00)
Yamaha Water Pump Repair Kit – Fits Yamaha 250HP F250/F250B Outboards (Replaces 6P2-W0078-00-00) 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
Product Details
This Yamaha Water Pump Repair Kit – Fits Yamaha 250HP F250/F250B Outboards (Replaces 6P2-W0078-00-00) provides all essential components to restore your engine's cooling system. It is specifically designed for Yamaha 250HP 4-Stroke F250 and F250B outboard models, ensuring a precise fit and reliable performance.
This kit serves as a direct interchange for Yamaha part number 6P2-W0078-00-00 and Sierra 18-3515.
- Direct replacement for a hassle-free installation.
- Complete kit includes impeller, gaskets, O-rings, and hardware.
- Engineered to meet or exceed original equipment specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6P2-W0078-00-00 |
| Sierra | 18-3515 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F250 | 250 | 4-Stroke | 6P2-W0078-00-00 | ||
| Yamaha | F250B | 250 | 4-Stroke | 6P2-W0078-00-00 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct replacement
- Dimensions
- 13.0" H x 14.0" W x 21.0" L
- Other Technical Attributes
- Complete kit for water pump replacement
What’s in the Box
- 1 x Cartridge Insert (61A-44322-02-00)
- 1 x O-Ring (93210-86M38-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x Impeller (6E5-44352-01-00)
- 1 x Cartridge Outer Plate (6P2-44323-00-00)
- 1 x Water Pump Gasket (60X-44315-A0-00)
- 2 x Dowel Pins (93606-12019-00)
- 4 x Bolts, With Washer (90119-08M14-00)
- 1 x Woodruff Key (90280-04M05-00)
Installation Notes
- Disconnect the battery and remove the lower unit from the outboard motor.
- Remove the old water pump housing bolts and lift the housing off.
- Take note of the old impeller's vane direction before removing it and the Woodruff key.
- Clean all mating surfaces thoroughly, removing any old gasket material.
- Install the new Woodruff key, impeller (rotating clockwise), and gaskets.
- Apply a light coat of marine grease to the new O-rings and install them.
- Reassemble the water pump assembly and torque bolts to manufacturer specifications.
- Reinstall the lower unit, ensuring all connections are secure.
- Test the engine's cooling system at idle before full operation.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha F250?
This kit is for Yamaha F250 and F250B 4-stroke models. The most reliable way to confirm fitment is by matching your engine's required part number to 6P2-W0078-00-00. Always check the compatibility table.
What are the signs of a failing water pump?
Common signs include an engine overheat alarm, a weak or non-existent "telltale" water stream, or a dry, cracked, or deformed impeller upon inspection.
How often should the water pump impeller be replaced?
As a general maintenance guideline, we recommend inspecting the impeller annually and replacing it every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).
Can I replace just the impeller instead of the whole kit?
While possible, it is highly recommended to replace all components in the kit—including gaskets, plates, and O-rings—as they wear together. This ensures a complete and reliable repair.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs 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 QC.
Payment & Security
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