OMC Port Cylinder Head 0328324 0321013 150 155 175 185

( Brand: Omc ), ( Manufacturer Part Number: 328324 ), ( Part Type: Hp Cylinder Head ), ( Country Of Manufacture: United States ), ( Motor Engine Type: Johnson Evinrude ), ( Donor Motor: Loose )

Review OMC Johnson Evinrude Port Cylinder Head 150 155 175 185 Hp fits 1983–1992

The **Johnson/Evinrude OMC Port Cylinder Head** (part numbers **328324**, **0328324**, **321013**, and **0321013**) is a meticulously engineered component designed to restore peak performance and reliability to classic **1983 1985 and 1992** outboard motors in the **150 HP, 155 HP, 175 HP, and 185 HP** series. Crafted from high-grade aluminum alloy, this precision-machined cylinder head features a **ported intake and exhaust design**, optimized to enhance airflow and combustion efficiency critical for maintaining the original power output and smooth operation of these legendary Evinrude engines. The head is built to exacting specifications, ensuring a proper seal with the cylinder block while accommodating the unique porting patterns found in these older yet highly sought-after motors. Whether replacing a worn or damaged head or upgrading for improved performance, this part is a direct-fit solution, compatible with the **Johnson/Evinrude 150 185 HP models** from the specified years, including those equipped with **E-Tech or conventional carburetion systems**. Its durable construction and compatibility with modern fuel and oil standards make it an ideal choice for restorers, enthusiasts, and mechanics looking to preserve the integrity of these classic outboards while ensuring long-term durability. Proper installation, including the use of high-quality gaskets and torque specifications, is essential to prevent leaks and maintain optimal engine function.

Buying a used **Johnson/Evinrude OMC port cylinder head** (specifically for models like the 328324, 0328324, 321013, 0321013 from 1983 1992, covering 150 185 HP engines) can be a cost-effective solution for restoring or repairing an older outboard motor. Below are the key pros and cons to consider before making a purchase.

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### **Pros of Buying a Used Port Cylinder Head**

1. **Cost Savings**

A new OMC port cylinder head can cost several hundred dollars, whereas a used one especially from a reliable source may be significantly cheaper. This makes it a practical option for budget-conscious DIYers or small businesses.

2. **Compatibility with Older Engines**

These cylinder heads are designed for specific OMC/Evinrude models from the early 1980s to early 1990s. If your engine is from that era, a used head will fit without modification, assuming the part numbers match.

3. **Availability of Spare Parts**

While newer engines may have discontinued parts, older OMC/Evinrude components (like cylinder heads, pistons, and gaskets) are still available through specialty marine suppliers, salvage yards, or online marketplaces. This makes repairs easier.

4. **Potential for Customization**

Some used cylinder heads may have been modified (e.g., ported for better airflow) by previous owners. If you re looking for performance upgrades, a well-maintained used head might offer advantages over a stock replacement.

5. **Environmental and Economic Benefits**

Buying used reduces waste and supports the reuse of mechanical components, which aligns with sustainability goals. It also avoids the environmental impact of manufacturing a new part.

6. **Testing and Verification**

Since the head is pre-owned, you can inspect it for cracks, warping, or wear before purchasing. A thorough inspection (including pressure testing for leaks) ensures you re not buying a faulty part.

7. **Community and Support Networks**

Older OMC/Evinrude engines have dedicated forums (e.g., Evinrude Outboard Forum, MarineWarheads) where buyers can ask for advice, verify authenticity, or find trusted sellers. This reduces the risk of scams or misrepresented parts.

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### **Cons of Buying a Used Port Cylinder Head**

1. **Uncertain History and Wear**

Without a full service history, you can t be certain how much wear the head has undergone. Issues like cracked cast iron, burned valves, or internal corrosion may not be immediately visible. A used head could require additional machining or replacement of internal components (e.g., valves, guides, or springs).

2. **Risk of Damage or Improper Storage**

Cylinder heads are delicate improper storage (e.g., exposure to moisture, extreme temperatures, or physical damage) can lead to rust, warping, or internal corrosion. A head that was stored poorly may need extensive refurbishing before use.

3. **Compatibility Issues**

While the part numbers suggest compatibility, slight variations in model years or minor modifications (e.g., different carburetor setups or fuel injection changes) could require additional parts or adjustments. Always cross-reference with your engine s exact specifications.

4. **Limited Warranty or No Guarantee**

Used parts typically come with no warranty. If the head fails shortly after installation, you ll bear the cost of repairs or replacement. New parts, in contrast, often include manufacturer warranties.

5. **Time-Consuming Inspection and Preparation**

- Inspect for cracks (using dye penetrant or a magnifying glass).

- Check for warping (using a straightedge or bore gauge).

- Verify valve seat condition and valve operation.

- Ensure gasket surfaces are intact.

This process can delay your project if you re not experienced with engine repairs.

6. **Potential for Counterfeit or Salvage Parts**

The used marine parts market has risks of counterfeit or salvaged parts (e.g., from wrecked boats). Always buy from reputable sellers (e.g., certified salvage yards, trusted online marketplaces, or dealers with return policies).

7. **Machining and Rebuilding Costs**

- Decking (flattening the cylinder head surface).

- Valve job (lapping valves, replacing guides/seats).

- Porting or polishing for performance tuning.

These services add to the overall cost and time investment.

8. **Depreciation and Resale Value**

Used parts lose value over time, and if you later decide to sell or upgrade, the resale value may be minimal compared to a new part.

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### **Key Considerations Before Purchase**

1. **Source Verification**

- Buy from a trusted seller (e.g., a marine salvage yard with inspection reports, eBay with positive feedback, or a local mechanic specializing in OMC engines).

- Avoid private sellers with no history unless you can inspect the part in person.

2. **Inspection Checklist**

- **Visual Inspection**: Look for cracks, rust, or deformities.

- **Pressure Test**: Use a cylinder head tester to check for leaks (available at auto parts stores).

- **Valve Operation**: Ensure valves open and close smoothly; test for pitting or wear.

- **Deck Surface**: Check for flatness (warping can cause gasket leaks).

- **Port Condition**: If performance is a priority, assess port smoothness.

3. **Budget for Additional Costs**

- Gaskets, bolts, and hardware (often required for installation).

- Machining or rebuilding costs if the head needs work.

- Labor if you re not comfortable with the installation.

4. **Alternatives**

- **Remanufactured Parts**: Some suppliers offer rebuilt cylinder heads with warranties (e.g., Marine Parts Warehouse, Evinrude-authorized remanufacturers).

- **New OEM Parts**: If budget allows, a new head from OMC may be worth the investment for long-term reliability.

- **DIY vs. Professional Help**: Decide whether you ll tackle the installation yourself or hire a mechanic.

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### **Conclusion and Recommendation**

- Are working on a tight budget and prioritize affordability.

- Have the time and mechanical skill to inspect and prepare the part.

- Buy from a reputable source with a clear return policy.

- Are willing to invest in additional machining or rebuilding if needed.

- Need a part with a warranty or guarantee.

- Lack experience with engine repairs and cannot verify the head s condition.

- Are unable to commit to the extra time and potential costs of refurbishment.

- Prefer the reliability of a new or remanufactured part for critical applications.

If you re confident in your ability to inspect and refurbish the part, purchasing a used cylinder head from a **verified salvage yard or trusted online seller** can save money. Prioritize parts with a **clear history, minimal wear, and a thorough inspection**. If uncertainty exists, consider a **remanufactured or new OMC part** for peace of mind.

1. **Compare prices** from multiple sources (salvage yards, eBay, marine forums).

2. **Request photos and videos** of the part s condition before purchasing.

3. **Consult a mechanic** familiar with OMC engines to assess the head s viability.

4. **Budget for contingencies** used parts often require extra work to be road-ready.

Ultimately, the decision depends on your **experience level, budget, and project timeline**. For most DIYers, a used head is a viable option if approached carefully, while those seeking hassle-free reliability may prefer a new or remanufactured replacement.

Details:

Altman, IL 62411. OMC Johnson Evinrude cylinder head and cover assembly. Part Numbers Cylinder Head: 328324 0328324 Cover: 320840 0320840.

Please be absolutely sure this is the correct one for your motor prior to purchasing. Condition Used Lays flat No cracks or breaks Scuffs and scratches from normal use Will need new gaskets Connector on thermostat is broken will replaced. The item you are looking at is guaranteed to be described, pictured, and cross-referenced correctly. Fitment 1983 - 1991 Johnson Evinrude 150 HP 1984 - 1992 155 175 1985 185 1983 200 235.

Removed from an outboard application using the part numbers listed above.

part #: 328324 prices

• $21.00-$78.95

specifications ouboaen:

• for makes: Johnson, Evinrude, Omc
• for years: 1983-1992
• brand: Omc
• mpn: 328324
• part type: Hp Cylinder Head
• country of manufacture: United States
• motor engine type: Johnson Evinrude
• donor motor: Loose

payments ouboaen:

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

seller ouboaen:

• city: Altamont, Illinois
• # reviews: 34319
• rating: 99.8%

shipping ouboaen:

• cost: $0.00
• service: Standard
• transit: 4-7 Days
• class: Standard
• type: Fixed

general ouboaen:

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

returns ouboaen:

• policy: No Returns

offer ouboaen:

• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 14, 2026
• availability: In Stock

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