1. Boat Outboard Engines To Buy
  2. sku: 23554237394138721
  3. ENGINEERED MARINE PRODUCTS 27-02872

ENGINEERED MARINE PRODUCTS 27-02872 Emp Head Gasket 27-820438 18-3855

fits model: Sierra. make: Mercury.

27-820438 Engineered Marine Products Emp 27-02872 Head Gasket Mercury Sierra 18-3855

( Brand: Engineered Marine Products ), ( Manufacturer Part Number: 27-02872 ), ( Part Type: Gasket Head )

Review ENGINEERED MARINE PRODUCTS Emp Head Gasket Mercury fits SIERRA

The **Marine EMP 27-02872 Head Gasket** is a precision-engineered, high-performance gasket designed specifically for Mercury Marine s **27-820438** outboard motors, as well as compatible with **Sierra 18-3855** and similar marine applications. Crafted from a robust, multi-layered steel construction with a reinforced core, this gasket ensures an airtight and watertight seal between the cylinder head and engine block, preventing coolant leaks, compression loss, and overheating critical factors for maintaining peak performance in demanding marine environments. The gasket features a **butyl rubber coating** on both sides, providing superior adhesion to the engine surfaces while resisting corrosion, oil, and fuel degradation over time. Its **precision-cut design** aligns perfectly with the engine s mating surfaces, reducing the risk of warping or misalignment, which can lead to costly engine damage. Ideal for both new installations and replacements, this gasket is built to withstand the high pressures and thermal cycling inherent in marine propulsion systems, ensuring long-term reliability and efficiency. Whether used in recreational boats, fishing vessels, or performance cruisers, the **Marine EMP 27-02872** delivers the durability and sealing integrity required to keep your Mercury or Sierra outboard running smoothly for thousands of hours. Proper installation with the correct torque specifications and gasket sealant is recommended to maximize performance and longevity.

### **Pros and Cons of buying a Marine Emp 27-02872 Head Gasket (Mercury 27-820438 & Sierra 18-3855)**

#### **Pros:**

1. **Compatibility** This head gasket is specifically designed for Mercury 27-820438 engines and Sierra 18-3855 engines, ensuring a proper fit and reducing the risk of leaks or improper sealing.

2. **High-Quality Materials** Marine Emp (a brand under Marine Engine Parts) typically uses durable materials that can withstand the thermal and mechanical stresses of marine engine operation, improving longevity.

3. **Prevents Coolant/Oil Mixing** A faulty head gasket can cause coolant to mix with oil, leading to overheating, reduced lubrication, and engine damage. A new gasket helps maintain proper separation between these fluids.

4. **Restores Engine Performance** If your engine was experiencing power loss, overheating, or white smoke due to a blown gasket, replacing it can restore optimal performance and efficiency.

5. **Warranty Coverage** Some reputable sellers offer warranties or return policies, providing peace of mind in case of defects or installation issues.

6. **Cost-Effective Compared to Engine Replacement** Replacing a head gasket is significantly cheaper than a full engine overhaul, making it a practical solution for many boat owners.

7. **Professional-Grade Fit** Since this is an OEM or high-quality aftermarket part, it is designed to meet factory specifications, reducing the likelihood of future issues.

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#### **Cons:**

1. **Installation Complexity** Head gasket replacement requires precise alignment, torque specifications, and often involves removing the cylinder head, which can be labor-intensive. If not done correctly, it may lead to leaks or improper sealing.

2. **Labor Costs** If you do not have mechanical experience, hiring a professional marine mechanic will add to the overall expense. DIY installation carries the risk of mistakes.

3. **Potential for Additional Damage** If the engine has been running with a blown gasket for an extended period, internal components (such as pistons, valves, or cylinder walls) may have been damaged. A full inspection may be necessary before installation.

4. **Thermal Expansion Concerns** Some engines require careful handling during installation to account for thermal expansion, which can affect gasket compression. Improper handling may lead to leaks.

5. **Availability of Gasket Kit** While this part is available, some sellers may require purchasing an entire gasket kit (including bolts, seals, and gasket material) rather than just the gasket itself, increasing costs.

6. **Risk of Counterfeit Parts** If purchasing from an untrusted source, there is a chance of receiving a counterfeit or low-quality replica, which could fail prematurely.

7. **Downtime for Your Boat** The repair process will temporarily take your boat out of commission, which may be inconvenient if you rely on it for regular use.

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### **Conclusion:**

The **Marine Emp 27-02872 head gasket** is a reliable and well-suited replacement for Mercury 27-820438 and Sierra 18-3855 engines, offering long-term benefits in preventing leaks, restoring performance, and avoiding costly engine damage. However, the success of the repair depends heavily on proper installation whether done by a professional or carefully by an experienced DIYer.

If your engine is experiencing symptoms like overheating, white smoke, or coolant loss, replacing the head gasket is a practical solution. However, if the engine has sustained significant internal damage from prolonged gasket failure, additional repairs may be necessary.

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### **Recommendation:**

1. **Verify Symptoms** Confirm that the issue is indeed a blown head gasket (check for coolant in oil, overheating, or compression loss) before purchasing.

2. **Purchase from a Reputable Source** Buy from authorized dealers or trusted online retailers (e.g., Marine Engine Parts, Amazon, or specialty marine supply stores) to ensure authenticity.

3. **Consider a Gasket Kit** If available, opt for a complete kit (including bolts and seals) to ensure all necessary components are included.

4. **Professional Installation (If Possible)** If you lack mechanical experience, have a certified marine mechanic perform the replacement to avoid costly mistakes.

5. **Inspect for Additional Damage** After removing the cylinder head, check for warping, cracked components, or worn seals that may require attention.

6. **Follow Torque Specifications** Use a torque wrench and adhere strictly to the manufacturer s specifications to prevent leaks or damage.

7. **Test After Installation** Run the engine under load (with proper coolant and oil levels) to ensure there are no immediate issues before returning to full use.

**Final Verdict:** This head gasket is a solid choice for the specified engines, provided proper installation is carried out. If done correctly, it will extend the life of your engine and prevent further damage. However, weigh the labor costs and potential risks against the benefits before proceeding.

Details:

Ideal for engine rebuilds, repairs, or preventative maintenance. This gasket fits a range of 3-cylinder outboard motors commonly found in 70HP, 75HP, 85HP, 90HP, and 95HP applications. Condition: - New, Ready to install, This is a high-quality replacement gasket designed meet or exceed OEM specifications. Please verify fitment with your engine model and serial number before purchasing.

Fast shipping. Part Numbers / Cross References: - Mercury: 27-820438, EMP: 27-02872, Sierra: 18-3855, GLM: 36290, Mallory: 9-638 Compatibility: Fits many Mercury, Mariner, and Force 3-cylinder outboard engines typically early to mid-1990s model's. Brand new head gasket for Mercury, Mariner, and Force outboard engines.

specifications ouboaen:

  • for models: Sierra
  • for makes: Mercury
  • brand: Engineered Marine Products
  • mpn: 27-02872
  • part type: Gasket Head

returns ouboaen:

  • policy: No Returns

offer ouboaen:

  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: April 26, 2026
  • availability: In Stock

shipping ouboaen:

  • transit: 5-11 Days
  • class: Standard
  • cost: $0.00
  • carrier: USPS
  • type: Calculated
  • service: USPS Ground Advantage

payments ouboaen:

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

general ouboaen:

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

seller ouboaen:

  • city: Old Saybrook, Connecticut
  • # reviews: 151
  • rating: 0.0%
for models: sierra, for makes: mercury, part type: gasket head,
category: boat parts > outboard engines components, sku: 23554237394138721,
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