







This aftermarket water pump repair kit is designed to fit a wide range of Yamaha outboard motors from 150 HP to 300 HP, both 2-stroke and 4-stroke models. It includes all essential components needed to restore proper water circulation and cooling system performance in your outboard motor.
Replaces OEM Part Numbers:
Yamaha: 61A-W0078-A3-00, 61A-W0078-A2-00
Sierra: 18-3319
Compatible Yamaha Models (check exact year & type):
2-Stroke: 150HP, 175HP, 200HP, 225HP
4-Stroke: F150, F175, F200, F225, F250, F300 (depending on year/model series)
Kit Includes:
Water pump housing
Impeller
Gaskets and O-rings
Wear plate
Key and seals
Features:
High-quality replacement kit
Durable materials for long service life
Meets or exceeds OEM performance
Helps prevent engine overheating
Ideal for routine maintenance or rebuilds
Installation Notes:
Professional installation recommended
Refer to your engine’s service manual for instructions
Replace impeller and water pump components regularly as part of routine maintenance
Condition: Brand New
Quantity: 1 Kit
Application: Yamaha outboard engines 150–300 HP (verify model compatibility before purchase)
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| Brand | Unbranded |
|---|---|
| Manufacturer Part Number | 61A-W0078-A3-WH |
| Similar Fits Number | 18-3319, 18-3396-1, 9-48618, 61A-W0078-A4-00 |
| Similar Fits Numbers | 61A-44311-01-00, 61A-W0078-A3-00, 61A-44311-01-00 |
| Type | Water Pump Repair Kit |
| Material | Rubber, Stainless Steel, Plastic |
| Placement on Vehicle | Lower Unit |
| Compatible Brand | Yamaha Outboard Motors |
| Compatible Model | 150 HP to 300 HP |
| Engine Type | 2 & 4 Stroke (Model and Year Dependent) |
| Unit Quantity | 1 Set |
| Condition | New, Sealed, Unopened |
| Country/Region of Manufacture | Taiwan |

