OMC Impeller Plate Gasket 0323312 25/35HP

( Brand: Omc ), ( Manufacturer Part Number: 323312 ), ( Part Type: Gasket Impeller Plate )

Review OMC Impeller Plate Gasket Evinrude Johnson 25/35hp fits 1978-79

The **OEM 323312 / 0323312 Impeller Plate Gasket** is a precision-engineered replacement part designed specifically for **Evinrude Johnson 25HP and 35HP outboard motors** manufactured between **1978 and 1979**. This gasket serves as a critical sealing component within the impeller housing, ensuring a tight, leak-free interface between the impeller plate and the engine block. Crafted from high-quality, durable materials, this gasket is engineered to withstand the demanding conditions of marine environments, including exposure to water, salt, and varying temperatures. Its unique design incorporates strategically placed sealing ridges and reinforced edges to maintain optimal compression and prevent fluid leaks, which could compromise engine performance or lead to costly internal damage. Whether you're restoring a classic Evinrude Johnson motor or performing routine maintenance, this gasket is an essential upgrade to preserve the integrity of your engine s impeller system. Its compatibility with the specified model range ensures a perfect fit, allowing for a seamless installation that restores factory-like reliability. By using this genuine OEM part, you can trust in its long-lasting performance, reducing the risk of premature wear and ensuring your outboard motor operates at peak efficiency for years to come.

### **Pros and Cons of buying a OMC 323312 / 0323312 Impeller Plate Gasket for Evinrude/Johnson 25/35HP (1978-79)**

1. **Direct Fitment** This gasket is specifically designed for Evinrude/Johnson outboards in the 25/35HP range from 1978 to 1979, ensuring proper alignment and sealing without modification.

2. **Prevents Leaks** A worn or missing impeller plate gasket can cause coolant or oil leaks, leading to overheating or engine damage. Replacing it restores proper function.

3. **Cost-Effective Repair** Compared to labor-intensive repairs (e.g., replacing the impeller plate or lower unit seals), this gasket is a relatively inexpensive fix.

4. **Easy Installation** The gasket is designed for straightforward replacement, requiring only basic tools and mechanical knowledge.

5. **Prevents Long-Term Damage** Ignoring a failing gasket can lead to more severe issues, such as warped impeller plates or internal engine damage, making early replacement a proactive measure.

6. **Authentic OEM Quality** As an OMC (Original Manufacturer) part, it meets the same standards as the original equipment, ensuring durability and reliability.

1. **Limited Availability** Older OMC parts, especially for discontinued models, can be harder to find compared to newer or more common components.

2. **Potential Counterfeit Risk** Since this is an older part, there is a chance of purchasing a replica or low-quality aftermarket substitute that may not fit or last as long.

3. **Mixed Condition of Surrounding Parts** If the impeller plate or other components are worn, replacing just the gasket may not fully resolve the issue, requiring additional repairs.

4. **Time-Consuming Installation** While not overly difficult, removing the impeller plate and lower unit may take time, especially for those unfamiliar with outboard maintenance.

5. **Cost of Labor (If Needed)** If the owner lacks mechanical experience, hiring a professional may add to the expense, though this is a one-time cost.

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### **Conclusion**

The **OMC 323312 / 0323312 impeller plate gasket** is a **practical and cost-effective solution** for preventing leaks and maintaining the health of a 1978-79 Evinrude/Johnson 25/35HP outboard. Its direct fitment and ease of installation make it a **reliable choice** for DIY enthusiasts or mechanics. However, potential buyers should ensure they are purchasing an **authentic OMC part** to avoid counterfeit issues and verify that surrounding components (like the impeller plate) are in good condition to avoid recurring problems.

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### **Recommendation**

- You are experiencing leaks from the impeller plate area.

- You want to perform a routine maintenance check on your outboard.

- You have access to the correct tools and mechanical knowledge (or are willing to pay for professional installation).

- You can verify the part s authenticity (preferably from a trusted dealer or online retailer specializing in marine parts).

- You cannot confirm the part s authenticity (risk of counterfeit).

- The impeller plate or other internal components are visibly damaged, as additional repairs may be needed.

- You are uncomfortable with the installation process and lack access to a mechanic.

**Final Verdict:** This is a **worthwhile purchase** for preventing minor but critical failures in an older Evinrude/Johnson outboard, provided the part is genuine and surrounding components are in decent condition. For long-term reliability, consider inspecting the impeller plate and lower unit seals simultaneously.

Details:

This gasket ensures a secure seal between the impeller plate and engine block, preventing leaks maintaining proper performance. The 323312 0323312 Impeller Plate Gasket is a specific replacement part for OMC Evinrude Johnson outboard engines with 25/35HP from the years 1978-1979. The 323312 gasket is a critical sealing component in the water pump stack for many 25 35 HP Johnson/Evinrude outboards. No warping, no moisture staining, and compression marks.

If you re rebuilding a vintage water pump, OEM gaskets are the only way to ensure proper sealing and long term reliability aftermarket paper often vary in thickness cut quality. Your gasket is New Old Stock, meaning it has never been installed and shows only light shelf wear from long term storage. This is a genuine OMC 323312 Impeller Plate Gasket, pulled from preserved OEM inventory not reproduction and part of generic aftermarket kit.

part #: 323312 prices

• $7.15-$15.99

specifications ouboaen:

• for makes: Evinrude, Johnson, Omc
• for years: 1978-79
• brand: Omc
• mpn: 323312
• part type: Gasket Impeller Plate

shipping ouboaen:

• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• cost: $0.00
• carrier: USPS
• transit: 3-7 Days

offer ouboaen:

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

payments ouboaen:

• wallet: Paypal
• credit card: Diners-club
• other

returns ouboaen:

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

general ouboaen:

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

seller ouboaen:

• city: Sioux Falls, South Dakota
• rating: 99.7%
• # reviews: 463

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