SIERRA 18-3155 Water Pump Repair Kit 808282286392 47-72774A89

( Brand: Sierra ), ( Manufacturer Part Number: 18-3155 ), ( Type: Water Pumps Repair ), ( Country Of Origin: United States ), ( UPC: 808282286392 )

Review SIERRA Water Pump Repair Kit Mercury Oem

The **Sierra 18-3155 Water Pump Repair Kit** is a meticulously engineered solution designed specifically for Mercury outboard motors from the **47 to 72 horsepower** range, ensuring optimal performance and longevity for your marine engine. This premium repair kit is crafted to address common water pump failures, a critical component that circulates coolant through the engine to prevent overheating and maintain peak efficiency. The kit includes a **high-quality replacement impeller**, typically the most frequently worn part in the water pump assembly, along with a **sealing gasket** and **bearing assembly** to restore smooth operation and prevent leaks. Engineered with durable materials, the impeller is precision-machined to match the original specifications, ensuring a perfect fit and seamless integration with the pump housing. The accompanying gasket is designed to create an airtight seal, preventing coolant leaks that could lead to engine damage or reduced performance. Additionally, the bearing assembly is reinforced with corrosion-resistant coatings to withstand the harsh marine environment, providing extended durability and reducing the risk of premature wear. This repair kit is ideal for both professional mechanics and DIY enthusiasts, offering a straightforward and cost-effective way to revive a failing water pump without the need for a full replacement. By restoring the water pump to factory-like condition, this kit helps maintain your Mercury outboard s cooling efficiency, fuel economy, and overall reliability, ensuring countless hours of trouble-free operation on the water. Whether you re preparing for a season of boating or addressing an unexpected issue mid-cruise, the **Sierra 18-3155 Water Pump Repair Kit** delivers the precision, quality, and performance you need to keep your engine running at its best.

**Pros and Cons of buying a Sierra 18-3155 Water Pump Repair Kit for a Mercury 47-72774A89 Engine**

### **Pros**

1. **Compatibility** The kit is specifically designed for the Mercury 47-72774A89 engine, ensuring a proper fit without modifications. This reduces the risk of damage or improper installation.

2. **Quality Materials** Sierra is a reputable brand known for manufacturing reliable marine and engine components. The kit likely includes high-quality seals, gaskets, and bearings that meet or exceed OEM standards.

3. **Cost-Effective Repair** Replacing just the water pump components (rather than the entire assembly) is often cheaper than buying a full replacement pump. This can save money while extending the life of the engine.

4. **Preventative Maintenance** If the water pump is failing or showing signs of wear (e.g., leaks, overheating), addressing it early can prevent more costly engine damage down the line.

5. **Ease of Installation** Since the kit includes all necessary parts (seals, gaskets, bolts, etc.), it simplifies the repair process for DIYers. Instructions are typically included, making it accessible for those with basic mechanical skills.

6. **Performance Improvement** A properly functioning water pump ensures efficient cooling, which can improve engine longevity and performance, especially in high-demand applications like boating.

7. **Warranty Coverage** Some Sierra kits may come with a limited warranty, providing peace of mind against defects in materials or workmanship.

### **Cons**

1. **Skill Dependency** While the repair is manageable for experienced DIYers, those without mechanical knowledge may struggle with tasks like removing the old pump, aligning components, or ensuring proper torque on bolts. Improper installation can lead to leaks or premature failure.

2. **Time-Consuming** Removing and reinstalling the water pump requires disassembling parts of the engine or cooling system, which can take several hours, especially for first-timers.

3. **Tool Requirements** The repair may necessitate specialized tools (e.g., puller for the impeller, torque wrench, seal installation tools), which could add to the overall cost if they re not already owned.

4. **Potential for Additional Damage** If the water pump failure was caused by underlying issues (e.g., a failing impeller, corroded housing, or improper maintenance), simply replacing the seals and gaskets may not fully resolve the problem. Further inspection or repairs might be needed.

5. **Labor Costs if Professional Help is Needed** If the repair is outsourced to a mechanic, the labor costs could outweigh the savings of a DIY approach, especially for older or high-hour engines where the pump is part of a larger overhaul.

6. **Limited Availability of Parts** While Sierra is reliable, some specialized components (e.g., impellers or drive belts) might not be included in the kit and would need to be purchased separately, adding to the total cost.

7. **Risk of Counterfeit or Low-Quality Kits** If purchasing from an untrusted seller (e.g., third-party online marketplaces), there s a chance of receiving counterfeit or substandard parts that fail prematurely.

### **Conclusion**

The Sierra 18-3155 water pump repair kit is a practical and cost-effective solution for addressing wear or failure in a Mercury 47-72774A89 engine, provided the repair is within the scope of the kit s components. It offers a balance between affordability and quality, making it suitable for DIY enthusiasts who are comfortable with basic engine maintenance. However, the success of the repair hinges on the user s mechanical skill, access to proper tools, and the willingness to invest time in the process. For those who lack confidence in their abilities or encounter unexpected complications, consulting a professional may be the safer option.

### **Recommendation**

- You have experience with engine repairs or are willing to research and practice the procedure beforehand.

- The water pump failure is isolated to the seals, gaskets, or bearings (not the impeller or housing).

- You have access to the necessary tools (or are prepared to rent/purchase them).

- You re comfortable with the time commitment and potential for trial and error.

- You re unsure about the extent of the damage or the correct repair procedure.

- The engine has high hours or shows signs of broader issues (e.g., coolant leaks elsewhere, overheating).

- You value convenience and want to avoid the risk of further damage from improper installation.

- Verify the kit s compatibility with your exact engine model (some variations may exist).

- Purchase from an authorized dealer or reputable seller to ensure authenticity.

- Follow the manufacturer s instructions closely and use the correct torque specifications.

- Consider replacing the impeller or drive belt if they re worn, even if not part of the kit, to ensure a complete repair.

Details:

Restore a Mercuries stern drive water pump to ship-shape. Kit components are engineered to meet or exceed OEM specifications Inclusive kit eliminates time spent sourcing individual parts Replaces Mercuries p/n 46-72774A89 Fits Bravo drives with pumps 2 piece housing.

part #: 183155 prices

• $69.95-$168.99

specifications ouboaen:

• for makes: Mercury
• brand: Sierra
• mpn: 18-3155
• type: Water Pumps Repair
• country of origin: United States
• upc: 808282286392

payments ouboaen:

• credit card: Mastercard
• money order
• other
• wallet: Apple-pay

general ouboaen:

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

seller ouboaen:

• # reviews: 512
• rating: 100.0%
• city: Bethel Island, California

shipping ouboaen:

• cost: $0.00
• class: Standard
• type: Calculated
• carrier: USPS
• transit: 5-11 Days
• service: USPS Ground Advantage

returns ouboaen:

• paid by: Buyer
• time: 14 Days
• policy: Returns Accepted

offer ouboaen:

• options: Ship-to-home
• started: April 19, 2026
• sold: 0
• quantity: 2
• availability: In Stock

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