Water Pump Gasket – Fits Yamaha F300/F350 V8 Outboards (Replaces 6AW-44315-00-00)
Water Pump Gasket – Fits Yamaha F300/F350 V8 Outboards (Replaces 6AW-44315-00-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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 aftermarket Water Pump Gasket is a direct-fit replacement for Yamaha F300 and F350 V8 4-stroke outboard engines manufactured between 2007 and 2019. It ensures a proper seal for the water pump housing, preventing leaks and maintaining cooling system integrity.
It serves as a direct replacement for Yamaha OEM part number 6AW-44315-00-00.
- Installs directly, matching OEM specifications for a precise fit.
- Designed to connect seamlessly with the water pump housing (6AW-44311-01-00).
- Engineered as a standalone replacement or as part of a complete water pump repair.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6AW-44315-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha engines, this gasket fits specific F300 and F350 V8 models. Please verify your exact model code and year range before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F300TUR | 300 | 4-Stroke | 2007–2010 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF300TUR | 300 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350TUR | 350 | 4-Stroke | 2007–2011 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350TUR | 350 | 4-Stroke | 2007–2009 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350UCA | 350 | 4-Stroke | 2010–2011 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350XCA | 350 | 4-Stroke | 2010–2011 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350UCA | 350 | 4-Stroke | 2010–2011 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350XCA | 350 | 4-Stroke | 2010–2011 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350UCB | 350 | 4-Stroke | 2012–2015 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350XCB | 350 | 4-Stroke | 2012–2015 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350NCB | 350 | 4-Stroke | 2014–2015 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350UCB | 350 | 4-Stroke | 2012–2015 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350XCB | 350 | 4-Stroke | 2012–2015 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350NCC | 350 | 4-Stroke | 2016–2019 | 6AW-44315-00-00 | V8 engine |
| Yamaha | F350NCC2 | 350 | 4-Stroke | 2018–2019 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-44315-00-00 | V8 engine |
| Yamaha | LF350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44315-00-00 | V8 engine |
Technical Specs
- Product Type
- Water Pump Gasket
- Installation
- Direct-fit OEM replacement
- Connection
- Direct-fit to water pump housing
- Dimensions (cm)
- 24.1 L x 11.5 W x 0.1 H
- Fitting Type
- Gasket
- Other Technical Attributes
- Used with water pump housing 6AW-44311-01-00
What’s in the Box
- 1 x Gasket, Water Pump (Replaces 6AW-44315-00-00)
Note: This gasket is sold individually but is also a component of the complete water pump repair kit (6AW-W0078-00-00), which includes the impeller and other parts for a full service.
Installation Notes
- Disconnect the engine's battery cables before beginning work.
- Remove the lower unit (gearcase) from the outboard motor.
- Unbolt and carefully lift the water pump housing to expose the old gasket and impeller.
- Remove the old gasket. Thoroughly clean both mating surfaces on the gearcase and the housing, ensuring they are free of old material and corrosion.
- Position the new gasket correctly on the gearcase.
- Reinstall the water pump housing and torque the bolts to the manufacturer's specified values.
- Reattach the lower unit to the outboard, ensuring the driveshaft and water tube are properly aligned.
- Reconnect the battery and test the engine using a water supply (flushing attachment or in the water) to check for proper water pump operation and to ensure there are no leaks.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is specifically for Yamaha F300–F350 V8 4-stroke outboards from 2007–2019. The most reliable method is to check your engine's model and year against the compatibility table in this listing. Checking the OEM part number (6AW-44315-00-00) against your service manual also ensures a match.
What are the signs of a failing water pump gasket?
A failed gasket can cause water leaks around the pump housing, leading to a loss of cooling pressure. Common symptoms include the engine overheating at idle or low speeds, a weak "telltale" water stream, or visible water dripping from the seam between the lower unit and the upper casing.
Should I replace anything else at the same time?
Yes. The gasket is typically replaced as part of a complete water pump service. It is highly recommended to also replace the impeller, wear plate, and any other seals or O-rings included in a full water pump repair kit (like 6AW-W0078-00-00) at the same time to ensure system reliability.
Can I reuse my old gasket?
No. Gaskets are single-use components designed to crush and create a seal. Once the water pump housing is removed, the old gasket will not provide a reliable seal and must be replaced to prevent leaks and potential engine damage.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
