Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 (Replaces 61A-W0078-A2-00)
Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 (Replaces 61A-W0078-A2-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 (R...
Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 (Replaces 61A-W0078-A2-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit with Housing – Fits Yamaha 150-300 HP V6 Outboard Motors (Replaces 61A-W0078-A2-00) provides all components needed for a complete water pump service. It is designed for a wide range of Yamaha 2-stroke and 4-stroke V6 outboard engines from 150HP to 300HP, models 1992 through 2023 and newer.
This kit serves as a direct replacement for multiple part numbers, including Yamaha 61A-W0078-A2-00, 61A-W0078-A3-00, 61A-W0078-A4-00, Sierra 18-3396-1, and Mallory 9-48618.
- Installation Location: Mounts on the lower unit of the outboard motor.
- Durable Materials: Features a robust Nylon PA66 housing, a neoprene impeller, and a stainless steel (SS316) insert cup and wear plate for corrosion resistance and longevity.
- Complete Kit: Includes the impeller, housing, plate, cup, gaskets, O-rings, and all necessary hardware for a full replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 61A-W0078-A2-00 |
| Yamaha | 61A-W0078-A3-00 |
| Yamaha | 61A-W0078-A4-00 |
| Yamaha | 64L-W0078-00-00 |
| Yamaha | 65L-W0078-A0-00 |
| Sierra | 18-3396-1 |
| Mallory | 9-48618 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This kit is designed for a wide range of V6 Yamaha outboards. Please verify your specific model is listed before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | LZ150, PX150, SX150, VX150, VZ150, Z150 | 150 | 2-Stroke | 1999–2005+ | 61A-W0078-A2-00 |
| Yamaha | VZ175 | 175 | 2-Stroke | 1992–2005+ | 61A-W0078-A2-00 |
| Yamaha | LF200, L200, LX200, LZ200, SX200, VX200, VZ200, Z200 | 200 | 2-Stroke | 1992–2005+ | 61A-W0078-A2-00 |
| Yamaha | F150 | 150 | 4-Stroke | All Models | 61A-W0078-A2-00 |
| Yamaha | F175 | 175 | 4-Stroke | 2002–2016+ | 61A-W0078-A2-00 |
| Yamaha | F200 | 200 | 4-Stroke | 2002–2016+ | 61A-W0078-A2-00 |
| Yamaha | VX225 | 225 | 2-Stroke | 2000–2005 | 61A-W0078-A2-00 |
| Yamaha | F225 | 225 | 4-Stroke | 2002–2016+ | 61A-W0078-A2-00 |
| Yamaha | VX250, Z250 | 250 | 2-Stroke | 2002–2005+ | 61A-W0078-A2-00 |
| Yamaha | F250 | 250 | 4-Stroke | 2005+ | 61A-W0078-A2-00 |
| Yamaha | LZ300, Z300 | 300 | 2-Stroke | 2003+ | 61A-W0078-A2-00 |
| Yamaha | F300 | 300 | 4-Stroke | 2003+ | 61A-W0078-A2-00 |
Technical Specs
- Product Type
- Water Pump Impeller Kit with Housing
- Installation
- Lower Unit
- Housing Material
- Nylon PA66 Plastic with Housing
- Housing Color
- Black
- Fitting Type
- Direct Replacement
- Other Technical Attributes
- Features stainless steel SS316 insert cup and plate, neoprene impeller and O-rings
What’s in the Box
- 1 x Water Pump Impeller (6E5-44352-01-00)
- 1 x Impeller Housing
- 1 x Insert Cup (61A-44322-00)
- 1 x Wear Plate (6G5-44323-00)
- 1 x Water Pump Gasket (6E5-44315-A0-00)
- 1 x Impeller Key (90280-04M05)
- 1 x O-Ring (93210-37M67-00)
- 1 x O-Ring (93210-86M38-00)
- 2 x Pin (93606-12019)
- 4 x Bolt & Washer (97080-08045)
Installation Notes
- Disconnect the battery and remove the engine cowling.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.
- Disconnect the speedometer tube (if present) and remove the bolts securing the lower unit to the engine.
- Carefully lower and remove the lower unit assembly.
- Unbolt and remove the old water pump housing to access the impeller and other components.
- Clean all mating surfaces thoroughly, removing any old gasket material or sealant.
- Install the new components from the kit in the reverse order of removal, starting with the wear plate, gasket, impeller key, and impeller. Ensure the impeller vanes are oriented correctly.
- Install the new housing, insert cup, and seals. Torque housing bolts to the manufacturer's specification.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly.
- Refill the gearcase with fresh marine gear oil and check for leaks. Reconnect the battery.
Troubleshooting & FAQ
How do I know if my water pump impeller is failing?
Common signs of a failing water pump include a weak or non-existent water stream from the "telltale" outlet, engine overheating alarms, and in severe cases, steam from the exhaust. It's crucial to address these symptoms immediately to prevent engine damage.
How often should I replace the water pump impeller?
For preventative maintenance, most manufacturers recommend replacing the water pump impeller and related components every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you operate in sandy, silty, or saltwater environments.
My engine overheated. Should I just replace the impeller?
If your engine has overheated, it's highly recommended to replace the entire water pump kit, including the housing. Overheating can warp the plastic housing and damage other components, and replacing only the impeller may not solve the underlying issue.
What is the difference between this aftermarket kit and the OEM version?
This kit is engineered to meet or exceed OEM specifications for fit, form, and function. It uses comparable, high-quality materials like Nylon PA66 plastic and neoprene rubber, offering a reliable, cost-effective alternative to the original manufacturer's part.
Do I need any special tools for this installation?
Standard mechanic's tools, including a socket set, torque wrench, and gasket scraper, are required. A driveshaft puller and alignment tools can be helpful but are not always necessary. Always refer to your engine's service manual for specific procedures and torque values.
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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