OMC SUZUKI 5033640 Cylinder Head Cover Valve 90-140 4-STROKE

( Brand: Omc Suzuki ), ( Manufacturer Part Number: 5033640 ), ( Part Type: Cover Valve Hp Cylinder Head ), ( Country Of Origin: Japan )

Review OMC SUZUKI Johnson 90-140 Hp 4-stroke Cylinder Head Cover Valve fits 2003–2006

The **OEM Suzuki 5033640 Cylinder Head Cover** is a precision-engineered component designed exclusively for **2003 2006 Johnson outboard motors** in the **90 140 HP 4-stroke** series, ensuring seamless compatibility with Suzuki s proprietary **E-TEC (Electronically Controlled Engine Technology)** and **4GXM** engine platforms. Crafted from high-grade **cast aluminum**, this valve cover is engineered to withstand the demanding thermal and mechanical stresses of high-performance marine applications while maintaining optimal airflow and pressure within the combustion chamber. Its sleek, aerodynamic design not only enhances engine efficiency but also contributes to a refined aesthetic, blending functionality with a polished, professional finish. The cover features a **tight-sealing gasket interface**, reinforced with **high-temperature silicone or rubber** to prevent oil leaks and ensure long-term reliability, even under the harshest boating conditions whether cruising on calm waters or tackling rough seas. The **integrated valve cover breather system** helps regulate internal pressure, reducing oil consumption and minimizing emissions, while the **precision-machined valve rocker arms and pushrod guides** within the cover contribute to smoother operation and extended engine life. Built to **OEM specifications**, this part is a direct replacement for the factory-equipped component, guaranteeing a perfect fit with minimal modifications required. Whether you're restoring a classic Johnson outboard or maintaining a high-performance vessel, this **genuine Suzuki cylinder head cover** delivers the durability, performance, and reliability expected from original equipment, ensuring your engine runs at peak efficiency for years to come.

### Pros and Cons of buying a OMC Suzuki 5033640 (2003 2006 Johnson 90 140 HP 4-Stroke Cylinder Head Cover with Valves)

1. **Compatibility and Fit:** This cylinder head cover and valve assembly is designed specifically for the OMC Suzuki 90 140 HP 4-stroke outboard engines from 2003 2006. It is a direct replacement part, ensuring a proper fit without modifications. This reduces the risk of installation issues and improves reliability.

2. **Performance and Reliability:** Suzuki outboards are known for their durability and efficiency. A genuine or high-quality aftermarket cylinder head cover and valve set helps maintain optimal engine performance by ensuring proper sealing, cooling, and valve operation. This can prevent overheating, misfires, or excessive oil consumption.

3. **Ease of Maintenance:** The cylinder head cover is a relatively accessible part, allowing for straightforward maintenance or replacement. Replacing worn or damaged valves and seals can extend the engine s lifespan and improve fuel efficiency. Many owners report that replacing these components as part of routine maintenance significantly reduces long-term repair costs.

4. **Cost-Effective Replacement:** Compared to rebuilding or replacing the entire engine, purchasing a new cylinder head cover and valve set is a cost-effective solution. It is often cheaper than labor-intensive repairs and helps avoid the downtime associated with major engine work.

5. **Improved Engine Longevity:** Valves and seals degrade over time due to wear, heat, and exposure to marine environments. Replacing them prevents carbon buildup, valve leakage, and other issues that can lead to catastrophic engine failure. This is particularly important for outboards used in saltwater, where corrosion accelerates wear.

6. **Access to Genuine Parts:** OMC Suzuki parts are widely available through marine dealers, online retailers, and specialty suppliers. This ensures you can easily source replacements or additional components if needed. Genuine parts are also backed by warranties, which provides peace of mind.

7. **DIY-Friendly:** Many boat owners with basic mechanical skills can replace the cylinder head cover and valves themselves. The process typically involves removing the old cover, inspecting the valves and seals, and installing the new components. Detailed repair manuals and online tutorials make this a manageable task for those comfortable with engine maintenance.

---

1. **Cost of Replacement Parts:** While cheaper than engine overhauls, the cylinder head cover and valve set is not a low-cost item. Prices can range from $100 to $300 or more, depending on whether you purchase a genuine OMC Suzuki part or a high-quality aftermarket alternative. This may be a significant expense for smaller boat owners or those on a tight budget.

2. **Labor Time and Skill Requirement:** Although the process is manageable for DIYers, it does require some mechanical skill and patience. Improper installation such as failing to torque the cover properly or not lubricating the valves correctly can lead to leaks, poor sealing, or even damage to the engine. Those without experience may need to hire a mechanic, adding to the cost.

3. **Potential for Counterfeit or Low-Quality Parts:** If purchasing from an untrusted source, there is a risk of receiving counterfeit or substandard parts. Low-quality valves or seals may wear out quickly, leading to repeated replacements and frustration. Always buy from reputable suppliers to avoid this issue.

4. **Additional Maintenance Requirements:** Replacing the cylinder head cover and valves often reveals other areas of the engine that may need attention. For example, you might discover worn piston rings, a fouled carburetor, or other issues that require additional repairs. This can turn a simple job into a more extensive and costly overhaul.

5. **Saltwater Corrosion Risks:** If the boat is used in saltwater, corrosion can accelerate the wear of the cylinder head cover, valves, and other components. Even with replacements, the engine may still require more frequent maintenance to combat rust and scale buildup. Regular flushes and descaling treatments are essential in saltwater environments.

6. **Limited Lifespan of Replacement Parts:** While high-quality parts are durable, they are not indestructible. Valves and seals may still wear out over time, especially in high-hour engines or those subjected to heavy use. This means the replacement may need to be repeated every few years, depending on usage.

7. **Potential for Overlooked Issues:** During the disassembly process, some owners may overlook other critical maintenance tasks, such as cleaning the combustion chamber, checking spark plugs, or inspecting the timing belt (if applicable). Skipping these steps can lead to future problems if the engine is not fully serviced.

---

The OMC Suzuki 5033640 cylinder head cover and valve set for the 2003 2006 Johnson 90 140 HP 4-stroke outboard is a practical and often necessary upgrade for maintaining engine health. The benefits such as improved performance, reliability, and longevity far outweigh the drawbacks for most boat owners. However, the decision to replace these components should be based on the engine s condition, your mechanical comfort level, and your budget.

If the engine is showing signs of valve wear (e.g., misfires, loss of power, excessive oil consumption, or blue smoke from the exhaust), replacing the cylinder head cover and valves is a proactive step that can prevent costly repairs down the line. For those who are not comfortable with DIY repairs, consulting a marine mechanic is advisable to ensure the job is done correctly.

---

- **Proceed with the replacement.** Purchase a genuine OMC Suzuki part or a high-quality aftermarket equivalent from a trusted supplier. Follow the manufacturer s guidelines for installation to avoid issues.

- **Consider a full valve job.** If the valves are worn or pitted, replacing them with new ones (or refurbished ones if budget is a concern) will restore optimal performance. This is a cost-effective way to extend the engine s life without a full rebuild.

- **Replace the cover and seals as a preventive measure.** This is a straightforward fix that can prevent minor issues from becoming major problems. Pair this with a thorough inspection of the valves and other components to catch any hidden wear.

- **Hire a professional.** While the job is manageable for experienced DIYers, a marine mechanic can ensure the replacement is done correctly, saving you from potential mistakes that could damage the engine. Factor in labor costs when deciding whether to DIY or outsource.

- **Adopt a regular maintenance schedule.** Replace the cylinder head cover and valves every 3 5 years, depending on usage (more frequently in saltwater). Combine this with regular oil changes, fuel system cleaning, and engine flushes to keep the outboard in top condition.

- **Monitor for signs of wear.** Keep an eye on oil consumption, exhaust smoke, and power output. Address any unusual symptoms promptly to avoid engine damage.

- **Prioritize quality.** Investing in a genuine or reputable aftermarket part ensures longevity and reliability. Cheap or counterfeit parts may save money upfront but could lead to repeated replacements and frustration.

- **Plan for additional maintenance.** If the engine is older or heavily used, be prepared for other components (e.g., carburetor, spark plugs, or timing belt) to require attention during the same service window.

---

**Final Verdict:** Replacing the OMC Suzuki 5033640 cylinder head cover and valves is a wise investment for maintaining or restoring the health of your 2003 2006 Johnson 90 140 HP 4-stroke outboard. The long-term benefits of improved performance, reliability, and engine longevity outweigh the short-term costs and effort required. For best results, approach the replacement with care, whether you do it yourself or with professional help, and pair it with a comprehensive maintenance plan.

Details:

No cracks, breaks or welds on this assembly. This assembly is in good working condition. CYLINDER HEAD: JOHNSON 115HP, 140HP, 90HP,: This part was removed from a 2004 Johnson 140 hp 4 stroke outboard, model number: J140PX4SR. For sale is the cylinder head cover for a 2003 2006 OMC Johnson Eventide Suzuki made 90-140 hp 4-stroke outboard, this may fit other model's too.

It is intact and in good condition.

part #: 5033640 prices

• $24.15-$99.99

specifications ouboaen:

• for makes: Johnson, Omc
• for years: 2003-2006
• brand: Omc Suzuki
• mpn: 5033640
• part type: Cover Valve Hp Cylinder Head
• country of origin: Japan

payments ouboaen:

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

general ouboaen:

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

shipping ouboaen:

• type: Fixed
• carrier: UPS
• cost: $21.99
• service: UPS Ground
• transit: 3-7 Days
• class: Standard

seller ouboaen:

• # reviews: 3013
• city: Lennon, Michigan
• rating: 100.0%

returns ouboaen:

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

offer ouboaen:

• sold: 0
• best offers: True
• options: Ship-to-home
• availability: In Stock
• started: May 11, 2026
• quantity: 1

Omc Suzuki 5033640 Is Similar To:

• 0123278 0123610 Omc Johnson Evinrude Outboard Motor Binnacle Control Box Handle Kit (30.1% similar) New handle kit fits single and dual mount binnacle controls...(May 28th, 2018)
• 0127084 Brp Evinrude Johnson Omc Stringer Thrust Washer (33.8% similar) Thrust washer...(July 2nd, 2018)
• 0173206 Omc Nip Relief Valve (31.2% similar) Listed as a to clear out fast. On jun at 12:39:42 PDT,: free. Not old junk that has been sitting for years. I will try my best to satisfy as want your repeat business. Than, mike the motors that we get in to tear down are very recently taken out of service due bad cylinder, ecu or Emma, etc. Save ...(December 10th, 2017)
• 0173298 Omc Johnson Evinrude Emergency Ignition Shut Off Switch Nos (27% similar) Omc,eventide,johnson new shut off stop switch kit. These kits are new old stock, they have not been used or opened, this product is no longer in production. Part number: 0173298RETAIL: 22...(March 2nd, 2019)
• 0174033 Omc New Johnson Evinrude (30.1% similar) New oem switch and connector am. If you choose the slow cheap option will get exactly what pay for...(April 30th, 2017)
• 0174811 174811 Johnson Evinrude Omc Stainless Prop Lh Outboard Propeller (30.1% similar) Condition: used but in good condition and guaranteed to function properly. Part: johnson eventide stainless LHS counter rotation viper prop x 19P v6 outboard propeller fits various motor parts. Pb please see included pictures...(October 30th, 2018)
• 0176360 176360 Omc Horn Assy Johnson Evinrude (28.6% similar) Part: 2004 -2005 prices...(March 17th, 2019)
• 0176461 Omc Nos Johnson Evinrude Remote Oil Fill Kit (34.6% similar) New Omc item in box...(November 29th, 2018)
• 0176711 176711 0768411 768411 0176711 176711 0768411 Johnson-evinrude-omc-brp 745419070984 (24.6% similar) Never installed or used...(September 11th, 2017)
• 0177284 Evinrude Brp Omc Johnson Outboard Gallon Remote Oil Tank Sensor (26.3% similar) Omc, eventide, johnson e-etc outboard motor 3 gallon remote oil tank w bracket. Mounting bracket not included. Good for all Omc, eventide, johnson model's including e-etc will work with Fichte oil sensor has continuity...(January 7th, 2019)
• 0203362 Omc Evinrude Johnson 203362 (25.9% similar) Eventide johnson cam follower roller and shaft fits diameter 5HP 1957 only fits 10HP 1961 18HP only 1961 ROLLER is...(January 12th, 2018)