JOHNSON EVINRUDE OMC 0508399 Water Pump Kit

( Brand: Johnson Evinrude Omc ), ( Manufacturer Part Number: 0508399 ), ( Part Type: Pump ), ( Warranty: 30 Day ), ( Authorized Reseller/dealer: No )

Review JOHNSON EVINRUDE OMC Oem Water Pump Kit

The **Johnson Evinrude OMC 0508399 (508399) Water Pump Kit** is a high-performance, precision-engineered replacement component designed exclusively for Evinrude and Johnson outboard motors, ensuring optimal cooling and lubrication for your engine while maintaining peak efficiency. This kit is a critical part of the motor s cooling system, featuring a robust impeller and housing assembly that work in tandem to circulate water through the engine block, preventing overheating and extending the lifespan of your motor. Crafted from durable materials, including high-grade aluminum and corrosion-resistant alloys, this water pump kit is built to withstand the demands of saltwater, freshwater, and heavy-duty use, making it an ideal choice for both recreational boaters and professional anglers who demand reliability in harsh marine environments.

The **0508399** pump kit is engineered to fit seamlessly with a variety of Evinrude and Johnson outboard models, including those from the E-TEC, E-TEC HP, and E-TEC XP series, ensuring a perfect match for engines ranging from mid-size to larger displacements. Its compact yet sturdy design allows for easy installation, even for those with limited mechanical experience, though proper alignment and sealing are essential for optimal performance. The impeller s aerodynamic blades are precision-cut to maximize water flow, reducing strain on the motor while minimizing noise and vibration, which translates to a smoother, more enjoyable boating experience. Whether you're powering a speedboat, a fishing vessel, or a leisure craft, this water pump kit delivers the performance and durability needed to keep your engine running cool under any conditions.

For those who prioritize longevity and performance, the **Johnson Evinrude OMC 0508399** water pump kit is a must-have replacement part, offering a direct OEM (Original Equipment Manufacturer) solution that meets or exceeds factory specifications. This kit is particularly beneficial for owners who have experienced leaks, reduced water flow, or unusual noises from their water pump, as it provides a straightforward upgrade to restore proper cooling functionality. When paired with genuine OMC fluids and maintenance practices, this pump kit ensures that your outboard motor operates at its best, reducing the risk of costly repairs and maximizing fuel efficiency. Whether you're preparing for a weekend on the lake or a long day of deep-sea fishing, investing in this high-quality water pump kit guarantees that your engine remains protected and ready for action.

**Pros and Cons of buying a Johnson/Evinrude OMC 0508399 (508399) Water Pump Kit**

The **Johnson/Evinrude OMC 0508399 (508399) water pump kit** is a common replacement part for older Evinrude and Johnson outboard motors, particularly those from the 2000s to mid-2010s. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **Compatibility with Older Models**

- **Evinrude E-TEC and E-TEC HP** (e.g., 90 HP, 115 HP, 150 HP)

- **Johnson Mercury** (e.g., 90 HP, 115 HP, 150 HP)

- **OMC (Outboard Marine Corporation) engines** from the early 2000s

This makes it a **versatile replacement** for common failures in older motors.

2. **Prevents Engine Overheating**

A failing water pump can lead to **severe engine damage** due to overheating. Replacing it proactively ensures **coolant circulation**, protecting the motor s internal components like the **cylinder head, pistons, and bearings**.

3. **Cost-Effective Replacement**

Compared to **full engine rebuilds or replacements**, the water pump is a **relatively inexpensive part** (typically **$50 $150** depending on the source). Labor costs for replacement are also **moderate** (usually **$100 $200** depending on the mechanic).

4. **Easy to Install (With Basic Tools)**

- Removing the **lower unit cover**

- Replacing the **impeller and seals**

- Reinstalling the **pump shaft and pulley**

Many **YouTube tutorials** and **service manuals** are available to guide the process.

5. **Extends Engine Lifespan**

Since the water pump is a **critical cooling component**, replacing a worn one can **significantly extend the life** of an otherwise healthy engine. Many owners report **years of trouble-free operation** after this repair.

6. **Available from Multiple Sources**

- **Official dealerships** (Evinrude/Johnson/Mercury)

- **Online retailers** (Amazon, eBay, specialty marine parts stores)

- **Used/aftermarket markets** (sometimes at a discount)

This ensures **easy availability** even for older models.

7. **Prevents Contamination from Coolant Leaks**

A failing water pump can cause **coolant leaks**, leading to **mixed oil and coolant** (which can ruin the engine). Replacing it **before failure** avoids this costly issue.

---

### **Cons**

1. **Potential for Counterfeit or Low-Quality Parts**

Due to the part s popularity, **counterfeit or substandard replicas** are sometimes sold, especially on **eBay or untrusted online marketplaces**. Buyers should:

- **Verify the seller s reputation**

- **Check for OEM packaging and part numbers**

- **Purchase from authorized dealers** when possible

2. **Wear on Related Components**

If the water pump has been **running degraded for a long time**, other parts (such as the **pump shaft, seals, or impeller**) may also be **worn or damaged**. This could require **additional repairs**, increasing total costs.

3. **Labor-Intensive Installation (For Some Models)**

While many installations are straightforward, **some older Evinrude/Johnson engines** have **tight spaces or complex lower unit designs**, making removal and replacement **more difficult**. A **professional mechanic** may be needed for:

- **Engines with complex lower unit seals**

- **Models requiring torque specifications on bolts**

- **Engines with rusted or seized components**

4. **Risk of Overlooking Underlying Issues**

If the water pump failure is **symptomatic of a larger problem** (e.g., **coolant leaks, cracked head gaskets, or failing impeller bearings**), simply replacing the pump **without diagnosing the root cause** could lead to **recurring issues**.

5. **Limited Warranty (If Purchased from Non-OEM Sources)**

**OEM (Original Equipment Manufacturer) parts** often come with **limited warranties**, while **aftermarket or used parts** may have **no warranty**. This means if the pump fails shortly after installation, **repair costs fall on the owner**.

6. **Potential for Misalignment or Improper Installation**

- **Whine or vibrate excessively** (indicating misalignment)

- **Leak coolant** (if seals are not properly seated)

- **Fail prematurely** (if bolts are not torqued properly)

A **careful, step-by-step installation** is required to avoid these issues.

7. **Not a Permanent Fix for Older Engines**

If the engine is **very old (15 years)**, other **wear-and-tear issues** (e.g., **cracked cylinder heads, worn bearings, or fuel system problems**) may still exist. Replacing just the water pump **may not be enough** to restore full functionality.

---

### **Conclusion**

The **Johnson/Evinrude OMC 0508399 (508399) water pump kit** is a **highly practical and cost-effective solution** for preventing **engine overheating and failure** in compatible older outboards. Its **wide compatibility, ease of installation, and affordability** make it a **smart investment** for boat owners who want to **extend their engine s lifespan**.

However, buyers should be **cautious about part quality**, **thoroughly inspect related components**, and **follow installation guidelines** to avoid **recurring problems**. Additionally, if the engine is **extremely old or has multiple issues**, a **full diagnostic** may be warranted before proceeding with just the water pump replacement.

---

### **Final Recommendation**

You own a **compatible Evinrude/Johnson/OMC engine** (verify model year and HP).

You **hear unusual noises** (whining, grinding) or notice **overheating**.

You want a **cost-effective way to prevent catastrophic engine failure**.

You re **comfortable with basic DIY repairs** or have access to a **reliable mechanic**.

You suspect **other major engine issues** (e.g., coolant leaks, cracked head gaskets).

You re buying from an **untrusted seller** (risk of counterfeit parts).

The engine is **extremely old** and may need **more extensive repairs**.

You **lack mechanical experience** and are unsure about installation.

- **Purchase from an authorized dealer** (Evinrude/Mercury dealership) or a **trusted online retailer** (e.g., **Mercury Marine s official site, Amazon with verified sellers**).

- **Check for matching part numbers** (some engines require **specific impeller types**).

- **Inspect the old pump** if the **shaft or bearings are worn**, consider replacing them as well.

- **Follow torque specifications** when reinstalling bolts to prevent leaks or misalignment.

- **Consider a professional installation** if you re unsure about the process.

**Verdict:** **Worth the purchase for most owners of compatible older Evinrude/Johnson engines**, provided due diligence is taken in **part selection and installation**. It is one of the **most cost-effective ways to avoid a $3,000 engine replacement**.

Details:

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part #: 0508399 prices

• $55.22-$84.95

specifications ouboaen:

• for makes: Johnson
• brand: Johnson Evinrude Omc
• mpn: 0508399
• part type: Pump
• warranty: 30 Day
• authorized reseller/dealer: No

offer ouboaen:

• started: May 3, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• best offers: True

returns ouboaen:

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

shipping ouboaen:

• carrier: USPS, UPS
• transit: 3-5 Days
• type: Calculated
• service: USPS Ground Advantage, USPS Priority Mail, UPS Ground
• cost: $14.10
• class: Standard, Expedited

seller ouboaen:

• rating: 99.9%
• city: Plainwell, Michigan
• # reviews: 30868

payments ouboaen:

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

general ouboaen:

• condition: New other see details
• Boat Parts > Outboard Engines Components > Other

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