NOTH BOAT PARTS 46-817275A5 Water Pump Impeller Housing Kit 4-STROKE 40 50 60

( Brand: Noth Boat Parts ), ( Manufacturer Part Number: 46-817275A5 ), ( Warranty: 1 Year ), ( Type: Outboard Water Pump Impeller Repair Kit ), ( Motor Engine Type: Mercury Mariner 40-115 Hp Outboard Motor ), ( Sierra P/n: 18-3570 )

Review NOTH BOAT PARTS Water Pump Impeller Kit Housing Mercury 4-stroke 40 50 60 Hp fits 1970

The **Noth Boat 46-817275A5 Water Pump Impeller Kit and Housing** is a meticulously engineered replacement assembly designed exclusively for Mercury 4-stroke outboard engines in the 40 to 70 horsepower range, ensuring optimal cooling performance and longevity for your marine application. This high-quality kit includes a precision-machined **impeller housing** and a **durable impeller assembly**, both crafted from corrosion-resistant materials to withstand the harsh conditions of saltwater and constant exposure to the elements. The impeller housing is engineered to fit seamlessly with the engine s cooling system, maintaining proper water flow while reducing the risk of leaks or premature wear. The included impeller features a carefully balanced design, featuring optimized blade geometry to maximize water displacement and cooling efficiency, which is critical for maintaining engine temperature and preventing overheating during extended runs or heavy loads. Whether you re restoring an older Mercury 4-stroke or upgrading an existing system, this kit provides a direct-fit solution that restores factory performance, ensuring reliable operation whether you re cruising on calm lakes or tackling rough coastal waters. Built to meet Mercury s stringent specifications, this replacement kit eliminates the guesswork of aftermarket parts, offering a trusted, long-lasting upgrade that keeps your engine running smoothly for years to come.

### **Pros and Cons of buying a Mercury 4-Stroke 40-70 HP Water Pump Impeller Kit (Part #46-817275A5)**

1. **Compatibility** This kit is designed specifically for Mercury 4-stroke outboards in the 40-70 HP range, ensuring a proper fit without modification. It includes the impeller, housing, and associated components, reducing the need for additional parts.

2. **Performance Improvement** A worn or damaged water pump impeller can lead to reduced cooling efficiency, overheating, and engine strain. Replacing it with an OEM or high-quality aftermarket kit restores proper water flow, improving engine performance and longevity.

3. **Preventative Maintenance** Regular replacement of the water pump impeller (as part of routine maintenance) helps avoid sudden failures, which can cause severe engine damage if the impeller seizes or breaks.

4. **Ease of Installation** Since this is a direct replacement kit, installation is straightforward for those with basic mechanical skills. Most users can complete the job in under an hour with the right tools.

5. **Cost-Effective Upgrade** Compared to full water pump replacements or engine repairs caused by neglect, this kit is a relatively inexpensive solution. It extends the life of the existing water pump assembly.

6. **OEM Quality (if genuine)** If purchasing an original Mercury part, it ensures reliability and compatibility with the engine s specifications. Aftermarket kits may offer similar performance but should be from reputable brands.

7. **Reduced Risk of Cooling Issues** Proper water flow prevents overheating, which is critical for maintaining engine efficiency and avoiding costly repairs.

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1. **Potential Counterfeit Parts** If buying from untrusted sellers (especially online marketplaces), there is a risk of receiving counterfeit or low-quality replicas. Always verify the seller s reputation and part authenticity.

2. **Labor Costs (if professional installation)** While DIY installation is possible, some boat owners may prefer a marine mechanic, adding labor costs to the total expense.

3. **Limited Lifespan** Like all mechanical components, the impeller and housing will eventually wear out again, requiring future replacements. However, this is true of any water pump part.

4. **Compatibility Confusion** Some users may mistake this kit for a different model (e.g., 2-stroke or a slightly different 4-stroke variant), leading to incorrect installation. Always double-check the engine model and year before purchasing.

5. **Environmental Considerations** If the old impeller is not disposed of properly, it may contribute to marine debris. Proper recycling or disposal is recommended.

6. **Aftermarket Variability** Non-OEM kits may vary in quality, durability, or fit. While some aftermarket brands are reliable, others may fail prematurely, leading to additional costs.

7. **Time-Consuming for Inexperienced Users** Removing the old impeller and installing the new kit requires access to the water pump, which may involve draining the lower unit or removing the lower trim plate. Those unfamiliar with outboard maintenance may find the process challenging.

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### **Conclusion**

The **Mercury 4-Stroke 40-70 HP Water Pump Impeller Kit (46-817275A5)** is a **practical and cost-effective solution** for maintaining proper engine cooling and preventing overheating. Its **direct compatibility** with Mercury 4-stroke outboards in the specified power range makes it a reliable choice for routine maintenance or repairs. However, **quality concerns** (especially with aftermarket or third-party sellers) and **installation complexity** for less experienced users are key considerations.

For **best results**, purchase from an **authorized Mercury dealer or a trusted marine parts supplier** to ensure authenticity. If unsure about installation, consult a marine mechanic. Given its **benefits in preventing engine damage and improving performance**, this kit is **highly recommended** for owners of compatible Mercury outboards who prioritize preventative maintenance.

**Buy the kit from a reputable source** (e.g., Mercury dealership, Sea-Doo dealer, or well-reviewed online retailers like West Marine, BoatUS, or Amazon with verified sellers). Perform the replacement **during routine maintenance** to avoid unexpected cooling issues. If unsure about installation, seek professional help to ensure proper fitment and function. This is a **worthwhile investment** in the long-term health of your engine.

Details:

Water Pump Housing. Water Pump Impeller Kit W/Housing Mercury 4-Stroke 40 50 60 70 HP 46-817275A5. Sierra 18-3570. Fit Mercury Engine model's.

#46-817275Q05 #46-43024A7. Package Contains the Following Components. Mercury Marine Outboard Part OEM #46-817275A5.

specifications ouboaen:

• for makes: Mercury
• for years: 1970
• brand: Noth Boat Parts
• mpn: 46-817275a5
• warranty: 1 Year
• type: Outboard Water Pump Impeller Repair Kit
• motor engine type: Mercury Mariner 40-115 Hp Outboard Motor
• sierra p/n: 18-3570

payments ouboaen:

• other
• credit card: Mastercard
• wallet: Paypal

returns ouboaen:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping ouboaen:

• service: Standard
• type: Fixed
• class: Standard
• transit: 3-7 Days
• cost: $0.00

seller ouboaen:

• rating: 99.7%
• city: Hebron, Kentucky
• # reviews: 8885

general ouboaen:

• condition: New
• Boat Parts > Outboard Engines Components > Cooling Systems

offer ouboaen:

• started: April 15, 2026
• options: Ship-to-home
• sold: 0
• best offers: True
• availability: In Stock