1. Boat Outboard Engines To Buy
  2. sku: 24078265722495633
  3. EAST MARINE 27-19138

EAST-MARINE-PARTS 27-19138 Cylinder Head Gasket Outboard Parts 30 18-3804

fits make: Mercury.

27-19138 East-marine-parts Cylinder Head Gasket For Mercury 2 Stroke 30 Hp Outboard 18-3804

( Brand: East-marine-parts ), ( Manufacturer Part Number: 27-19138 ), ( Country Of Origin: China ), ( Type: Cylinder Head Gasket ), ( Engine Type: For Mercury 2 Stroke 30hp 30a Engines ), ( Sierra: 18-3804 ), ( Glm: 33880 ), ( Mallory: 9-63960 )

Review EAST MARINE PARTS Cylinder Head Gasket Mercury Stroke 30 Hp Outboard

The **East Marine Parts 27-19138 Cylinder Head Gasket** is a precision-engineered replacement component specifically designed for Mercury 30 horsepower outboard motors, particularly those with the model number **18-3804** and its variants. This high-quality gasket is crafted from durable, heat-resistant materials to ensure a reliable seal between the cylinder head and engine block, preventing coolant and oil leaks while maintaining optimal compression and performance. Engineered to meet the stringent demands of marine applications, the gasket features a tight, uniform fit that resists warping under high-pressure conditions, even in the harsh, corrosive environment of saltwater exposure. Its robust construction minimizes the risk of premature failure, extending the lifespan of your outboard motor and reducing the likelihood of costly repairs. Whether you're performing routine maintenance, addressing a leak, or upgrading your engine for improved efficiency, this gasket provides a seamless, long-lasting solution that aligns with East Marine s reputation for dependable marine parts. Proper installation, following manufacturer guidelines, will ensure peak performance and protection for your Mercury 30 HP outboard.

### **Pros and Cons of buying a East Marine Parts 27-19138 Cylinder Head Gasket for Mercury 30 HP Outboard (18-3804)**

#### **Pros:**

1. **OEM Compatibility** This part is designed specifically for Mercury 30 HP outboards, ensuring a proper fit and function. Using an aftermarket gasket that isn t OEM-rated could lead to leaks or performance issues.

2. **Reliability** East Marine is a well-known brand in the marine industry, and their gaskets are generally built to withstand the pressures and temperatures found in outboard engines. A quality gasket reduces the risk of catastrophic engine failure due to overheating or coolant loss.

3. **Ease of Installation** Since it s an OEM part, it should align correctly with the engine s cylinder head and block, making the installation process smoother compared to aftermarket gaskets that may require additional machining or adjustments.

4. **Warranty Coverage** Purchasing from a reputable dealer (like East Marine) may include warranty protection, offering peace of mind in case of defects or installation issues.

5. **Prevents Long-Term Damage** A failing cylinder head gasket can cause severe engine damage, including warped heads, blown seals, or coolant mixing with oil. Replacing it proactively avoids costly repairs down the line.

6. **Performance Consistency** A properly seated gasket ensures optimal sealing, maintaining proper compression and cooling critical for the longevity and efficiency of the Mercury 30 HP engine.

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#### **Cons:**

1. **Cost** OEM or high-quality gaskets can be more expensive than generic aftermarket alternatives. Depending on the source, this part may cost significantly more than a non-branded option.

2. **Limited Availability** If purchasing from a specialized marine parts supplier, availability may be restricted compared to more common automotive parts. Shipping times could be longer if ordering online.

3. **Potential for Counterfeit Parts** Buying from unauthorized sellers (e.g., third-party marketplaces) risks receiving counterfeit or low-quality gaskets that fail prematurely. Always verify the seller s authenticity.

4. **Installation Complexity** While the gasket itself is straightforward, removing and reinstalling the cylinder head requires mechanical skill. Improper torque or misalignment during installation can void warranties or cause leaks.

5. **Replacement Frequency** If the engine has been running with a failing gasket for an extended period, other components (e.g., water pump, seals, or cooling passages) may be damaged, requiring additional repairs beyond just the gasket.

6. **Depreciation** If the outboard is older or has high mileage, the overall cost of replacement parts (including labor) may not justify the investment if the engine is nearing the end of its useful life.

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### **Conclusion**

The **East Marine 27-19138 cylinder head gasket** is a **reliable, OEM-compatible choice** for a Mercury 30 HP outboard, offering peace of mind in terms of fit, performance, and longevity. While it may be more expensive than aftermarket alternatives, the risk of engine damage from a poor-quality gasket far outweighs the cost savings. However, if budget is a concern, ensure you re purchasing from a **trusted dealer** to avoid counterfeit parts.

For most boat owners, **this is the recommended option** especially if the engine shows signs of gasket failure (e.g., coolant loss, overheating, or white smoke). If the outboard is well-maintained and the gasket is failing due to normal wear, investing in a quality part now will prevent far more expensive repairs later.

**Final Recommendation:**

- **Buy from an authorized East Marine dealer or a reputable marine parts supplier** (e.g., West Marine, BoatUS, or a local Mercury dealer).

- **Verify the part number matches your engine model (18-3804)** to avoid mismatches.

- **Consider professional installation** if you lack mechanical experience, as improper handling can cause further damage.

- **Inspect other components** (e.g., water pump, head bolts, and seals) during replacement to ensure they re in good condition.

If cost is a major concern, **compare with other high-quality brands** (e.g., **Mercury Marine s own gaskets** or **Gasket Depot s OEM replacements**) to find the best balance between price and reliability. However, **cutting corners on a cylinder head gasket is not advisable** it s a critical safety and performance component.

Details:

Reach out to us, and we'll do our best make things right. Cylinder Head Gasket for Mercury 2 Stroke 30 HP Outboard Engine Replace OEM Part Numb er 27-19138 27-19138M 27-84733M Reference Number: Mercury: Sierra: 18-3804 GLM: 33880 Mallory: 9-63960 Fitment: 30HP 30A 1979-UP Package Include: 1 X Note 1.These are aftermarket parts with - level quality!, 2.Remember, many model's may have the same horsepower.

specifications ouboaen:

  • for makes: Mercury
  • brand: East-marine-parts
  • mpn: 27-19138
  • country of origin: China
  • type: Cylinder Head Gasket
  • engine type: For Mercury 2 Stroke 30hp 30a Engines
  • sierra: 18-3804
  • glm: 33880
  • mallory: 9-63960

returns ouboaen:

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

payments ouboaen:

  • wallet: Apple-pay
  • other
  • credit card: Diners-club

general ouboaen:

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

seller ouboaen:

  • rating: 99.9%
  • city: Hebron, Kentucky
  • # reviews: 1895

shipping ouboaen:

  • carrier: UPS
  • type: Fixed
  • class: Standard, Expedited
  • cost: $0.00
  • service: Standard, UPS Ground, Expedited
  • transit: 6-9 Days

offer ouboaen:

  • quantity: 10
  • options: Ship-to-home
  • best offers: True
  • sold: 0
  • availability: In Stock
  • started: May 21, 2026
for makes: mercury, country of origin: china, type: cylinder head gasket, engine type: for mercury 2 stroke 30hp 30a engines, sierra: 18-3804, glm: 33880, mallory: 9-63960,
category: boat parts > outboard engines components, sku: 24078265722495633,
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