Water Pump Repair Kit – Fits Yamaha F300 F350 (V8) Outboards (Replaces 6AW-W0078-00-00)
Water Pump Repair Kit – Fits Yamaha F300 F350 (V8) Outboards (Replaces 6AW-W0078-00-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Water Pump Repair Kit – Fits Yamaha F300 F350 (V8) Outboards (Repla...
Water Pump Repair Kit – Fits Yamaha F300 F350 (V8) Outboards (Replaces 6AW-W0078-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit – Fits Yamaha F300 F350 (V8) Outboards contains all the components needed to rebuild and service the water pump on Yamaha V8 4-stroke outboard engines. It is specifically designed for F300, LF300, F350, and LF350 models manufactured between 2007 and 2019.
This kit is a direct aftermarket replacement for Yamaha part number 6AW-W0078-00-00.
- Provides a direct-fit replacement for the original OEM water pump assembly.
- Includes all necessary gaskets, o-rings, and hardware for a complete rebuild.
- Engineered for use with water pump housing 6AW-44311-01-00 (sold separately).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6AW-W0078-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is compatible with a wide range of Yamaha V8 4-stroke outboards from 2007-2019.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F300TUR | 300 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF300TUR | 300 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F300TUR | 300 | 4-Stroke | 2010 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350TUR | 350 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350TUR | 350 | 4-Stroke | 2007–2009 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350TUR | 350 | 4-Stroke | 2010–2011 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350XCA | 350 | 4-Stroke | 2010–2011 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350UCA | 350 | 4-Stroke | 2010–2011 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350XCA | 350 | 4-Stroke | 2010–2011 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350UCA | 350 | 4-Stroke | 2010–2011 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350UCB | 350 | 4-Stroke | 2012–2015 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350XCB | 350 | 4-Stroke | 2012–2015 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350NCB | 350 | 4-Stroke | 2014–2015 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350UCB | 350 | 4-Stroke | 2012–2015 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350XCB | 350 | 4-Stroke | 2012–2015 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350NCC | 350 | 4-Stroke | 2016–2019 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | F350NCC2 | 350 | 4-Stroke | 2018–2019 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350UCC | 350 | 4-Stroke | 2016–2019 | 6AW-W0078-00-00 | V8 engine |
| Yamaha | LF350XCC | 350 | 4-Stroke | 2016–2019 | 6AW-W0078-00-00 | V8 engine |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct OEM replacement
- Connection
- Direct-fit to OEM housing
- Note
- For use with water pump housing 6AW-44311-01-00
What’s in the Box
- 1 x Gasket, Water Pump (6AW-44315-00-00)
- 1 x Insert, Cartridge (6AW-44322-00-00)
- 1 x Outer Plate, Cartridge (6AW-44323-00-00)
- 1 x Key (6AW-44336-00-00)
- 1 x Impeller (6AW-44352-00-00)
- 4 x Bolt, With Washer (90119-08M14-00)
- 1 x O-Ring (93210-37M67-00)
- 1 x O-Ring (93210-94003-00)
- 2 x Pin, Dowel (93606-12019-00)
Installation Notes
- Disconnect the battery and remove the engine cowling.
- Locate and unbolt the lower unit (gearcase) from the engine's midsection.
- Carefully lower the gearcase to access the water pump assembly on top of the driveshaft.
- Remove the bolts securing the water pump housing cover and lift it off.
- Take note of the component order, then remove the old impeller, wear plate, gaskets, and seals.
- Thoroughly clean all mating surfaces, ensuring they are free of old gasket material and corrosion.
- Install the new components from the kit in the reverse order of removal.
- Apply a light coat of marine grease to the new impeller and o-rings before installing them in the housing.
- Reassemble the water pump housing and torque bolts to manufacturer specifications.
- Reinstall the lower unit, ensuring the driveshaft, water tube, and shift shaft are correctly aligned.
- Reconnect the battery and test the engine using a water supply (flushing muffs) to verify proper water flow from the tell-tale port.
Troubleshooting & FAQ
How do I know if my water pump needs to be replaced?
Common signs of a failing water pump include a weak or intermittent water stream from the "tell-tale" port, engine overheating alarms at idle or low speed, and visible damage, cracking, or brittleness of the old impeller upon inspection.
How often should I service my Yamaha V8's water pump?
For high-performance outboards like the Yamaha V8 series, it is recommended to inspect the water pump annually and replace the impeller and gaskets every 1-2 years or 100-200 hours of operation, whichever comes first. Service intervals should be shorter for engines used primarily in saltwater or sandy/silty conditions.
Does this kit include the entire water pump housing?
No, this is a repair kit containing the internal wear-and-tear components (impeller, gaskets, plate, seals). It is designed to be installed into your existing water pump housing, Yamaha P/N 6AW-44311-01-00, which must be purchased separately if your original housing is damaged.
Is special grease needed for installation?
Yes, we strongly recommend applying a high-quality marine grease to the interior of the pump housing and a light coating on the new impeller. This prevents damage during the first dry startup and helps ensure a proper seal.
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.
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