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Water Pump Impeller Repair Kit for 150HP-300HP V6 Outboard 61A-W0078
Water Pump Impeller Repair Kit for 150HP-300HP V6 Outboard 61A-W0078
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Product Overview
This water pump impeller repair kit is designed as a replacement cooling system service kit for compatible 150HP, 175HP, 200HP, 225HP, 250HP, and 300HP V6 outboard engines.
It replaces part numbers 61A-W0078-A1, 61A-W0078-A1-00, 61A-W0078-A2-00, 61A-W0078-A3-00, and also cross-references Sierra 18-3396 and Mallory 9-48618.
The water pump impeller helps circulate cooling water through the outboard engine to maintain proper operating temperature. A worn or damaged impeller may cause weak water flow, overheating, poor cooling performance, or serious engine damage during marine use.
Built for high-horsepower V6 outboard applications, this repair kit is designed for durability and reliable cooling system service. Please compare the part number, housing inner diameter, impeller inner diameter, bolt dimensions, and product photos with your original water pump parts before ordering.
Product Compatibility
| Compatible Application | Details |
|---|---|
| V6 Outboard Engines | Compatible 150HP / 175HP / 200HP / 225HP / 250HP / 300HP applications |
| Replacement Part Numbers | 61A-W0078-A1 / 61A-W0078-A1-00 / 61A-W0078-A2-00 / 61A-W0078-A3-00 |
| Sierra Cross Reference | 18-3396 |
| Mallory Cross Reference | 9-48618 |
| Marine Outboard Motor | Water pump impeller repair and cooling system maintenance |
⚠️ Please confirm your original water pump repair kit part number before purchase. These kits are size-specific and not interchangeable with lower-horsepower outboard water pump kits.
Specifications
| Item | Details |
| Product Type | Water Pump Impeller Repair Kit |
| Replacement Part Numbers | 61A-W0078-A1 / 61A-W0078-A1-00 / 61A-W0078-A2-00 / 61A-W0078-A3-00 |
| Cross Reference | Sierra 18-3396 / Mallory 9-48618 |
| Compatible Engine Type | V6 Outboard Engines |
| Compatible Horsepower | 150HP / 175HP / 200HP / 225HP / 250HP / 300HP |
| Housing Inner Diameter | 28mm / 1.10" |
| Impeller Inner Diameter | 23mm / 0.90" |
| Bolt Length | 50mm / 1.96" |
| Bolt Diameter | 7mm / 0.27" |
| Application | Outboard cooling water pump repair |
| Condition | 100% Brand New |
Key Features
- Water pump impeller repair kit for compatible 150HP-300HP V6 outboard engines
- Replaces 61A-W0078-A1, 61A-W0078-A2-00, 61A-W0078-A3-00, Sierra 18-3396, and Mallory 9-48618
- Helps restore cooling water flow and reduce overheating risk
- Suitable for high-horsepower marine outboard cooling system maintenance
- Built for durability and long service life in harsh marine environments
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Fitment FAQ
Will this part fit my specific model and year?
This water pump impeller repair kit may fit compatible 150HP, 175HP, 200HP, 225HP, 250HP, and 300HP V6 outboard engines. Fitment depends on the original part number, water pump housing size, impeller size, bolt dimensions, and cooling pump design rather than horsepower alone.
Do I need to match the OEM part number?
Yes. For this water pump repair kit, matching the part number is strongly recommended. Please confirm your original part number matches 61A-W0078-A1, 61A-W0078-A1-00, 61A-W0078-A2-00, 61A-W0078-A3-00, Sierra 18-3396, or Mallory 9-48618 before ordering.
What models or situations does this part not fit?
This kit may not fit lower-horsepower outboard engines, non-V6 applications, or water pump systems with a different housing inner diameter, impeller inner diameter, bolt size, gasket shape, or pump structure. It is not recommended if your original part number does not match.
What should I check before ordering?
Before ordering, check your outboard horsepower, engine type, original part number, housing inner diameter, impeller inner diameter, bolt length, bolt diameter, gasket shape, and product photos. Make sure your original water pump components match this 61A-W0078 repair kit.