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Water Pump Impeller Repair Kit with Housing for Johnson Evinrude 35HP-60HP
Water Pump Impeller Repair Kit with Housing for Johnson Evinrude 35HP-60HP
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Product Overview
This water pump impeller repair kit with housing is designed as a replacement cooling system service kit for compatible Johnson and Evinrude 35HP, 40HP, 45HP, 48HP, 50HP, 55HP, and 60HP outboard models.
It replaces part numbers 396933, 390770, and Sierra 18-3399. The water pump impeller helps circulate cooling water through the outboard motor to maintain proper engine temperature during marine use. A worn impeller, damaged housing, or weak water pump assembly may cause reduced water flow, overheating, poor cooling performance, or possible engine damage.
This kit includes the water pump housing, making it suitable for repair situations where the original housing is worn, cracked, warped, or no longer sealing properly. Please compare the part number, housing shape, impeller length, inner diameter, gasket layout, and product photos with your original water pump parts before ordering.
Product Compatibility
| Compatible Brand / Model | Application |
|---|---|
| Johnson Outboard | 35HP / 40HP / 45HP / 48HP / 50HP / 55HP / 60HP |
| Evinrude Outboard | 35HP / 40HP / 45HP / 48HP / 50HP / 55HP / 60HP |
| Replacement Part Numbers | 396933 / 390770 |
| Sierra Cross Reference | 18-3399 |
| Marine Outboard Motor | Water pump impeller and housing repair |
⚠️ Please confirm your original water pump kit part number, housing shape, and impeller size before purchase.
Specifications
| Item | Details |
| Product Type | Water Pump Impeller Repair Kit with Housing |
| Compatible Brands | Johnson / Evinrude |
| Compatible Horsepower | 35HP / 40HP / 45HP / 48HP / 50HP / 55HP / 60HP |
| Replacement Part Numbers | 396933 / 390770 |
| Cross Reference | Sierra 18-3399 |
| Impeller Length | 60mm / 2.37" |
| Impeller Inner Diameter | 15mm / 0.59" |
| Application | Outboard cooling water pump repair |
| Condition | 100% Brand New |
Key Features
- Water pump impeller repair kit with housing for Johnson and Evinrude outboards
- Fits selected 35HP, 40HP, 45HP, 48HP, 50HP, 55HP, and 60HP models
- Replaces 396933, 390770, and Sierra 18-3399
- Helps restore cooling water flow and reduce overheating risk
- Includes housing for more complete water pump service and repair
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Fitment FAQ
Will this part fit my specific model and year?
This water pump impeller repair kit with housing may fit compatible Johnson and Evinrude 35HP, 40HP, 45HP, 48HP, 50HP, 55HP, and 60HP outboard models using part numbers 396933, 390770, or Sierra 18-3399. Fitment depends on the original part number, housing shape, impeller size, gasket layout, and water 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 kit matches 396933, 390770, or Sierra 18-3399 before ordering.
What models or situations does this part not fit?
This kit may not fit outboard motors with a different water pump housing, different impeller length, different inner diameter, different gasket shape, or a different service part number. It is not recommended for Mercury, Yamaha-style, Suzuki-style, or other non-Johnson / Evinrude applications unless the part number and design match exactly.
What should I check before ordering?
Before ordering, check your outboard brand, horsepower, original part number, impeller length, impeller inner diameter, housing shape, gasket layout, mounting points, and product photos. Make sure your original water pump components match this 396933 / 390770 / Sierra 18-3399 repair kit.