MERCURY 27-695252 Nos Cylinder Exhaust Cover Gasket Set 27-695242

( Manufacturer Part Number: 27-695252 ), ( Part Type: Cover Gasket Cylinder Exhaust ), ( Custom Sku: S68b2 ), ( Country Of Origin: United States )

Review MERCURY Nos Oem Genuine Cylinder Exhaust Cover Gasket Set

The **Mercury 27-695252 NOS Cylinder Exhaust Cover Gasket Set (27-695242)** is a meticulously crafted, high-performance replacement part designed to restore factory-sealed integrity to the cylinder exhaust cover assembly on select Mercury outboard motors, including models from the classic and modern era. This **new-old-stock (NOS) gasket set** features precision-engineered, high-temperature-resistant materials engineered to withstand the demanding conditions of marine environments, ensuring a secure, leak-free seal that maintains optimal engine performance and longevity. The gasket set includes a **primary exhaust cover gasket (27-695242)**, typically crafted from a durable, heat-resistant compound reinforced with fiberglass or silicone for superior durability and flexibility, preventing warping or degradation under thermal stress. Complementing this is a **secondary gasket or backing ring**, which provides an additional layer of sealing protection against oil and coolant leaks, critical for preserving the internal cleanliness of the engine bay. These components are designed to fit seamlessly with the original factory specifications, ensuring a perfect alignment with the cylinder exhaust cover, intake manifold, and surrounding mounting surfaces, thereby eliminating the risk of misalignment or improper sealing that can lead to exhaust gas leaks, reduced power output, or premature wear. Ideal for restoration projects, performance upgrades, or routine maintenance, this gasket set is a must-have for enthusiasts and mechanics seeking to maintain the authenticity and reliability of their Mercury outboard engines. Whether restoring a vintage classic or upgrading a modern model, the **27-695252 NOS gasket set** delivers the quality and precision expected from Mercury s original equipment, ensuring a professional-grade installation that enhances both performance and resale value.

### **Pros and Cons of buying a Mercury 27-695252 (Cylinder Exhaust Cover Gasket Set) and 27-695242**

1. **OEM Quality and Fit** Both parts are genuine Mercury Marine replacements, ensuring a proper fit and compatibility with the original engine design. This reduces the risk of leaks, misalignment, or performance issues that can occur with aftermarket or generic gaskets.

2. **Reliability and Durability** Mercury Marine parts are engineered to meet strict manufacturing standards, which means they are less likely to fail prematurely compared to cheaper alternatives. This can extend the lifespan of the exhaust cover and cylinder head, reducing long-term maintenance costs.

3. **Prevents Leaks and Contamination** A faulty gasket can lead to coolant or oil leaks, which can damage the engine over time. Replacing the gasket set ensures a tight seal, preventing fluid loss and potential overheating or corrosion.

4. **Easy Installation** These gaskets are designed to be straightforward to install, especially if you have basic mechanical experience. The kit includes all necessary components (typically two gaskets: one for the cylinder exhaust cover and one for the cylinder head), simplifying the replacement process.

5. **Warranty Coverage** Purchasing from an authorized dealer or directly from Mercury Marine may include warranty protection, offering peace of mind in case of defects or installation issues.

6. **Compatibility with Common Engines** The **27-695252** (exhaust cover gasket) and **27-695242** (cylinder head gasket) are designed for specific Mercury outboard models (likely 4-stroke engines in the 150 400 HP range, depending on the year). If you re replacing worn or damaged gaskets, these parts will match your engine s specifications.

7. **Prevents Exhaust Fumes and Contamination** A failing gasket can allow exhaust gases to enter the cooling system, leading to corrosion and reduced engine efficiency. Replacing them ensures proper sealing and maintains engine performance.

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1. **Cost** Genuine Mercury Marine parts are more expensive than aftermarket alternatives. While they offer better quality, the upfront cost may be higher than purchasing generic or third-party gaskets.

2. **Limited Availability** Depending on your location, these parts may not be readily available at local marine supply stores. You may need to order online, which could involve shipping delays.

3. **Potential Overkill for Minor Issues** If the gasket failure is isolated to one part (e.g., only the exhaust cover gasket is leaking), buying the full set (27-695252 27-695242) might be unnecessary. However, it s often recommended to replace both for consistency.

4. **Installation Complexity (If Unfamiliar)** While the gaskets themselves are simple to replace, removing the exhaust cover or cylinder head may require disassembling parts of the engine. If you lack mechanical experience, this could be time-consuming or frustrating.

5. **Risk of Over-Tightening** Improperly torquing the bolts when reinstalling the gasket can damage the engine block or head. Mercury provides torque specifications, but misalignment can still occur if not followed carefully.

6. **Alternative Parts May Be Suitable** In some cases, aftermarket gaskets (e.g., from **Fel-Pro, Sealed Power, or local marine suppliers**) may offer similar performance at a lower cost. However, these may not be as precisely engineered for Mercury s specific designs.

7. **Potential for Counterfeit Parts** If purchasing from third-party sellers (e.g., eBay, Amazon, or unverified online marketplaces), there is a risk of receiving counterfeit or low-quality replicas. Always buy from authorized dealers or reputable suppliers.

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The **Mercury 27-695252 (exhaust cover gasket) and 27-695242 (cylinder head gasket) set** is a high-quality, reliable choice for maintaining your Mercury outboard engine. The pros such as OEM fit, durability, and leak prevention outweigh the cons for most boat owners who prioritize long-term engine health and performance. However, the higher cost and potential overkill for minor issues should be considered.

If you are experiencing **exhaust leaks, coolant contamination, or overheating**, replacing these gaskets is a wise preventive measure. If you re on a tight budget and the gaskets are only slightly worn, you might explore **aftermarket options** (while ensuring compatibility). However, for most users, the **genuine Mercury parts are the safest and most effective solution**.

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- You want **OEM reliability** and long-term engine protection.

- You re replacing **both gaskets simultaneously** (best practice).

- You have **access to an authorized dealer** to avoid counterfeit parts.

- You re comfortable with **basic engine maintenance** or have a mechanic assist.

- You re **certain only one gasket needs replacement**.

- You re **on a budget** and can verify compatibility.

- You **trust the supplier s reputation** for quality.

- **Avoid cheap or unknown brands** unless you re **absolutely sure** they match Mercury s specifications, as this could lead to **frequent re-replacements and potential engine damage**.

**Final Verdict:** For most Mercury outboard owners, the **genuine gasket set is the best choice** for ensuring a proper seal, preventing leaks, and maintaining engine efficiency. If cost is a major concern, weigh the risks of aftermarket parts carefully. Always follow **torque specifications** and **proper installation procedures** to avoid damage.

Details:

If this listing is for used parts. Check pictures to make sure you are OK with condition before buying. Will get parts as pictured. They are normally dirty so expect them to have some grease, grime and or rust on.

If listing is for new old stock parts. They may have scratches, dust and or minor rust shelf wear, paint loss, dings, dents. Opened or missing original packaging.

part #: 27695252 prices

• $14.97-$21.19

specifications ouboaen:

• for makes: Mercury
• mpn: 27-695252
• part type: Cover Gasket Cylinder Exhaust
• custom sku: S68b2
• country of origin: United States

general ouboaen:

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

offer ouboaen:

• sold: 0
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: April 10, 2026

returns ouboaen:

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

payments ouboaen:

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

seller ouboaen:

• # reviews: 16486
• rating: 100.0%
• city: Levering, Michigan

shipping ouboaen:

• cost: $10.15
• type: Calculated
• carrier: USPS, FedEx
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery
• transit: 4-7 Days

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