Water Pump Housing – Fits Yamaha 6–15HP Outboards (Replaces 63V-44301-00-00)
Water Pump Housing – Fits Yamaha 6–15HP Outboards (Replaces 63V-44301-00-00) 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 aftermarket Water Pump Housing is designed to fit a range of Yamaha 4-stroke and 2-stroke outboards, specifically 6HP, 8HP, 9.9HP, and 15HP models. It serves as a crucial component for maintaining proper engine cooling and performance, ensuring a reliable replacement for worn or damaged original parts.
It directly replaces Yamaha OEM part number 63V-44301-00-00, offering a precise fit and function.
- Engineered as a direct OEM-level replacement for straightforward installation.
- Restores cooling system integrity to prevent engine overheating.
- Includes the main water pump housing unit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 63V-44301-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha 4-stroke engines, this housing fits select F6, F8, T8, F9.9, T9.9, and F15 models manufactured between 1998 and 2017. Please check the specific year ranges listed in the table.
For Yamaha 2-stroke engines, this housing is compatible with 9.9HP and 15HP models from the 1996 model year.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F6 | 6 | 4-Stroke | 2001–2008 | 63V-44301-00-00 | June 2008 & older |
| Yamaha | F8 | 8 | 4-Stroke | 2001–2016 | 63V-44301-00-00 | |
| Yamaha | T8 | 8 | 4-Stroke | 2001–2016 | 63V-44301-00-00 | High thrust model |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 2005–2017 | 63V-44301-00-00 | |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 2005–2017 | 63V-44301-00-00 | High thrust model |
| Yamaha | F15 | 15 | 4-Stroke | 1998–2009 | 63V-44301-00-00 |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 9.9/15 | 9.9/15 | 2-Stroke | 1996 | 63V-44301-00-00 |
Technical Specs
- Product Type
- Water Pump Housing
- Installation
- Direct OEM replacement
- Dimensions
- 6.0" x 6.0" x 3.0"
What’s in the Box
- 1 x Water Pump Housing (63V-44301-00-00)
Installation Notes
- Disconnect the spark plug leads and battery to prevent accidental starting.
- Place a drain pan under the lower unit and remove the gear lube drain screw to drain the lower unit oil.
- Remove the bolts securing the lower unit (gearcase) to the engine's upper casing.
- Carefully lower the gearcase to expose the water pump assembly on top of the drive shaft.
- Unbolt and remove the old water pump housing. Note the orientation of all components.
- Clean the mounting surface and install the new housing, ensuring all seals and gaskets (not included) are correctly seated.
- Reassemble the water pump, reattach the lower unit to the engine, and tighten all bolts to the manufacturer's specified torque.
- Refill the gearcase with fresh lubricant before starting the engine. Test in water to confirm proper cooling.
Troubleshooting & FAQ
How can I confirm this housing fits my engine?
Always verify the part number stamped on your original housing. Cross-reference it with the 63V-44301-00-00 number listed here and check your engine's model and year against the compatibility tables provided.
What are common signs of a failed water pump housing?
Symptoms include engine overheating alarms, a weak or non-existent water stream from the "tell-tale" outlet, visible cracks or warping on the housing, or scoring on the interior surfaces where the impeller spins.
How often should the water pump be serviced?
For optimal reliability, it is recommended to inspect the entire water pump assembly (including the impeller, gaskets, and housing) annually. Most manufacturers recommend replacing the impeller every 1-2 years or 100-200 operating hours, whichever comes first.
Does this part include the impeller or gaskets?
No, this listing is for the water pump housing only. Impellers, wear plates, gaskets, and seals are sold separately or as part of a complete water pump repair kit.
Is this an OEM Yamaha part?
This listing is for a high-quality aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is engineered to meet or exceed OEM specifications for fit, form, and function and is produced in an ISO 9002 certified facility.
What are the shipping speed and cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free for most orders, and expedited options are 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. Should an issue arise, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. 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.
Payment & Security
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