JOHNSON 308073 Water Pump Seal

( Brand: Johnson ), ( Manufacturer Part Number: 308073 ), ( Part Type: Seal Pump )

Review JOHNSON Evinrude Water Pump Seal New Free Shipping

The **Johnson 308073 Evinrude Water Pump Seal** is a high-performance, precision-engineered component designed specifically for Evinrude outboard motors, ensuring optimal cooling and lubrication for the water pump while maintaining the integrity of the engine s internal systems. Crafted from durable, corrosion-resistant materials, this seal is engineered to withstand the demanding conditions of marine environments, including exposure to saltwater, UV radiation, and constant vibration. Its robust construction features a reinforced rubber or elastomeric compound, carefully formulated to resist abrasion, swelling, and degradation over extended periods of use, even under high-pressure and high-temperature conditions common in outboard motors. The seal s unique design incorporates a lip or labyrinth configuration that effectively prevents water ingress while allowing smooth water flow through the pump, thereby minimizing the risk of leaks that could lead to engine overheating or failure. Ideal for applications ranging from recreational boating to professional fishing and offshore adventures, this seal is a critical replacement part for maintaining the reliability and longevity of Evinrude engines, particularly in models where the original water pump seal has worn out or been damaged. Whether installed during routine maintenance or as part of a repair, the **Johnson 308073** ensures a secure, leak-free seal that aligns with OEM specifications, helping to preserve the performance and efficiency of the motor while reducing the likelihood of costly repairs. Its compatibility with a wide range of Evinrude outboard models makes it a versatile and indispensable component for boat owners seeking dependable performance in any aquatic setting.

**Pros and Cons of buying a Johnson 308073 Evinrude Water Pump Seal**

The Johnson 308073 Evinrude water pump seal is a replacement part commonly used in Evinrude outboard motors, particularly for models with a water-cooled engine system. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Compatibility and Fit**

The seal is specifically designed for Evinrude outboard motors, ensuring a proper fit without modifications. This reduces the risk of leaks or improper installation, which can cause engine damage if water enters the crankcase.

2. **Reliability and Durability**

Johnson is a well-known manufacturer of marine parts, and this seal is built to withstand the demands of water-cooled engines. High-quality materials are used to resist wear, corrosion, and heat, extending the lifespan of the water pump and engine components.

3. **Prevents Engine Damage**

A failing water pump seal can lead to water leaking into the engine, causing corrosion, bearing failure, or even catastrophic engine damage. Replacing the seal proactively prevents costly repairs and downtime.

4. **Easy Installation**

The seal is designed for straightforward replacement, typically requiring only basic tools. Many users report that the process takes less than an hour, especially if the motor is already removed from the boat.

5. **Cost-Effective Long-Term Solution**

While the upfront cost may seem moderate, replacing a failing seal avoids the far more expensive repair or replacement of an entire water pump or engine. It is often cheaper than waiting for a complete failure.

6. **Widely Available**

The part is stocked by most marine supply stores, online retailers, and Evinrude dealerships. Availability ensures that you can purchase it quickly if needed, minimizing delays in repairs.

7. **Compatibility with Aftermarket Upgrades**

If you have modified your Evinrude engine (e.g., with a performance water pump), this seal is likely compatible, allowing for seamless integration with upgrades.

---

### **Cons**

1. **Limited Lifespan**

Like all seals, the Johnson 308073 Evinrude water pump seal has a finite lifespan, typically lasting **50 100 hours of engine runtime** or longer, depending on usage, water quality, and maintenance. Frequent use in saltwater or poor maintenance can shorten its life.

2. **Potential for Leaks During Installation**

If not installed correctly, the seal may leak, especially if the gasket surface is contaminated with debris or old sealant. Improper torque on the water pump or misalignment can also cause leaks.

3. **Requires Disassembly**

Replacing the seal usually means removing the water pump from the engine, which involves draining coolant, disconnecting hoses, and potentially removing the lower unit. This can be time-consuming for inexperienced DIYers.

4. **Cost of Replacement Parts**

While the seal itself is reasonably priced, you may need additional parts such as a new water pump gasket, coolant, or a new water pump if the existing one is worn out. These extras can add to the total cost.

5. **Saltwater Corrosion Risk**

If you operate in saltwater, corrosion can accelerate wear on the seal and surrounding components. Regular flushing with freshwater and using corrosion inhibitors can help mitigate this, but it remains a consideration.

6. **Mismatch with Non-OEM Pumps**

If you ve installed an aftermarket water pump that isn t compatible with the original seal dimensions, you may need a different seal model. Always verify compatibility before purchasing.

7. **Warranty Void if Not Installed Properly**

Some manufacturers (including Johnson) may void warranties if the seal is not installed correctly or if the engine is damaged due to improper maintenance. Following the manufacturer s guidelines is essential.

---

### **Conclusion**

The **Johnson 308073 Evinrude water pump seal** is a **highly recommended replacement part** for maintaining the health of your Evinrude outboard motor. Its **reliability, compatibility, and preventative benefits** far outweigh the minor drawbacks, particularly for boat owners who prioritize engine longevity and performance.

The **main risks** leaks, improper installation, or premature failure can be **mitigated with proper installation techniques, regular maintenance, and using high-quality sealant**. For most users, the **cost is justified** by avoiding far more expensive engine repairs.

If you re experiencing **water leakage, overheating, or unusual noises** from your water pump, replacing the seal should be a **priority**. However, if you re unsure about installation, consulting a marine mechanic may be worthwhile to ensure a proper job.

### **Final Recommendation**

- You have confirmed it matches your motor model.

- You are prepared to install it correctly (or have access to professional help).

- You want to prevent costly engine damage from water intrusion.

- You operate in freshwater or take steps to protect against saltwater corrosion.

**Avoid delaying replacement** if the seal is failing, as the consequences of neglect can be severe. For long-term reliability, consider **regularly inspecting and replacing the seal** every **50 100 hours** of runtime, especially in demanding conditions.

Details:

Johnson Evinrude Water Pump Seal 308073 NEW. Condition is New. Free Shipping. Shipped with USPS Ground Advantage.

part #: 308073 prices

• $8.41-$29.99

specifications ouboaen:

• for makes: Evinrude, Johnson
• brand: Johnson
• mpn: 308073
• part type: Seal Pump

general ouboaen:

• condition: New
• Boat Parts > Outboard Engines Components > Other

shipping ouboaen:

• service: USPS Ground Advantage
• carrier: USPS
• transit: 4-9 Days
• class: Standard
• type: Calculated
• cost: $0.00

payments ouboaen:

• wallet: Apple-pay
• credit card: Visa
• other

seller ouboaen:

• rating: 100.0%
• # reviews: 727
• city: Stamford, Connecticut

offer ouboaen:

• quantity: 1
• options: Ship-to-home
• started: February 16, 2026
• availability: In Stock
• sold: 0

returns ouboaen:

• policy: No Returns

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