Water Pump Cover – Fits Yamaha F300/F350 V8 Outboard Motors (Replaces 6AW-44312-00-00)
Water Pump Cover – Fits Yamaha F300/F350 V8 Outboard Motors (Replaces 6AW-44312-00-00) 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 Water Pump Cover – Fits Yamaha F300/F350 V8 Outboard Motors is engineered for Yamaha 4-Stroke F300–F350 V8 outboard motors manufactured between 2008 and 2019. It provides a secure and reliable seal for the water pump assembly, ensuring optimal engine cooling performance.
It serves as a direct replacement for Yamaha OEM part number 6AW-44312-00-00.
- Designed for direct OEM replacement installation.
- Constructed from high-strength, corrosion-resistant aluminum alloy.
- Operates effectively within the demanding marine temperature range.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6AW-44312-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This cover is compatible with the following Yamaha V8 outboard models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F300TXR | 300 | 4-Stroke | 2009 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350 | 350 | 4-Stroke | 2013–2019 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350NCB | 350 | 4-Stroke | 2014–2015 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350NCC/F350NCC2 | 350 | 4-Stroke | 2016–2019 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350UCB | 350 | 4-Stroke | 2013–2015 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350XCB | 350 | 4-Stroke | 2013–2015 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | F350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | LF350UCB | 350 | 4-Stroke | 2013–2015 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | LF350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | LF350XCB | 350 | 4-Stroke | 2013–2015 | 6AW-44312-00-00 | V8 Engine |
| Yamaha | LF350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44312-00-00 | V8 Engine |
Technical Specs
- Product Type
- Water Pump Housing Cover
- Installation
- Direct OEM replacement
- Housing Material
- Aluminum alloy
- Housing Color
- Silver metallic
- Product Dimensions
- 3.5" (L) x 1.5" (W) x 3.5" (H)
- Operating Temperature
- Marine operational temperature range
- Warranty
- Manufacturer standard warranty
What’s in the Box
- 1 x Cover, Water Pump Housing (Replaces 6AW-44312-00-00)
Installation Notes
- Before starting, disconnect the engine's battery and ensure the engine is cool.
- Remove the lower unit (gearcase) from the outboard motor by unfastening the mounting bolts.
- Locate and unbolt the existing water pump housing to access the old cover.
- Carefully remove the old water pump cover, taking note of the position of any gaskets or seals.
- Clean all mating surfaces thoroughly to remove old gasket material and corrosion.
- Place the new water pump cover into position, ensuring it aligns correctly with the housing and any new gaskets.
- Torque the bolts to the manufacturer's specified value to ensure an even seal.
- Reinstall the lower unit, reconnect the battery, and test the engine's cooling system at idle to check for leaks.
Troubleshooting & FAQ
How do I know if my water pump cover needs replacing?
Signs of a failing cover include visible cracks, corrosion, warping, or persistent water leaks from the pump housing area, which can lead to engine overheating. Regular inspection during impeller service is recommended.
Is this the complete water pump kit?
No, this is only the water pump housing cover. A complete repair kit, which typically includes the impeller, wear plate, and gaskets, is sold separately. This cover attaches to the water pump housing (part no. 6AW-44311-01-00).
What are the signs of a failing water pump on an outboard?
Common symptoms include the engine overheating, a weak or non-existent stream of water from the "telltale" outlet, and in severe cases, steam from the engine exhaust.
Can I reuse my old gaskets with this new cover?
It is strongly recommended to use new gaskets and seals whenever replacing water pump components. Reusing old, compressed gaskets can lead to improper sealing and water leaks, compromising the cooling system's integrity.
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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