MERCURY MARINE 29478 Engine Seal

( Brand: Mercury Marine ), ( Manufacturer Part Number: 29478 ), ( Part Type: Seal Engine )

Review MERCURY MARINE Genuine Oem Engine Seal

The Mercury Marine 29478 engine seal is an essential component designed to provide a reliable watertight seal between the engine and the lower unit of your outboard motor. This high-performance seal is engineered to withstand the rigors of continuous marine use and deliver optimal sealing performance in various operating conditions.

The Mercury Marine 29478 engine seal is meticulously crafted using a specially formulated elastomer material that offers superior flexibility, durability, and resistance to wear and tear. This material ensures a tight seal even in the face of extreme temperatures, vibration, and exposure to harsh marine environments.

This engine seal features a precision-machined design that ensures a perfect fit and easy installation. The seal's outer diameter measures 2.437 inches (61.92 mm), and its inner diameter is 2.350 inches (59.69 mm). The seal's length is 1.125 inches (28.61 mm), providing ample coverage to effectively seal the engine-to-lower unit joint.

The Mercury Marine 29478 engine seal comes with a distinctive ribbed design, which not only enhances its sealing capabilities but also helps dissipate pressure and prevent leakage. The ribs allow for even distribution of water and lubrication, leading to improved performance and a longer seal life.

Installation of the Mercury Marine 29478 engine seal is a straightforward process. Simply remove the old seal, clean the mating surfaces, apply a suitable sealant, and carefully install the new seal. Proper installation is crucial for achieving optimal sealing performance and preventing future leakage issues.

In summary, the Mercury Marine 29478 engine seal is an essential upgrade for your outboard motor, providing unparalleled sealing performance, durability, and protection against water intrusion. With its precision-machined design, high-performance elastomer material, and distinctive ribbed pattern, this engine seal is the go-to choice for boat owners seeking reliable, long-lasting sealing solutions.

Mercury Marine 29478 Engine Seal: A Comprehensive Analysis

The Mercury Marine 29478 engine seal is a critical component for maintaining the performance and longevity of Mercury Marine outboard engines. In this analysis, we will discuss the pros and cons of purchasing this engine seal to help you make an informed decision.

1. OEM Quality: The Mercury Marine 29478 engine seal is a genuine OEM (Original Equipment Manufacturer) part. This means it is designed, manufactured, and tested to meet the exact specifications and standards of Mercury Marine.

2. Superior Material: The engine seal is made of high-quality materials, such as Viton, which offers excellent sealing properties and resistance to various environmental conditions, including extreme temperatures, water, and oil.

3. Enhanced Engine Performance: A worn or damaged engine seal can lead to engine leaks, loss of power, and reduced performance. Replacing the seal with a new one can help restore engine performance by eliminating leaks and preventing the loss of vital engine fluids.

4. Longer Engine Life: Regular maintenance, including the replacement of engine seals, can contribute to the longevity of your Mercury Marine outboard engine.

1. Cost: The Mercury Marine 29478 engine seal is an investment, and the cost may be a deterrent for some. However, considering the importance of this component in maintaining engine performance and longevity, the cost may be justified.

2. Availability: Depending on your location and the availability of Mercury Marine dealers or authorized service centers, it may take some time to obtain the engine seal.

3. Installation: Installing the engine seal requires some technical knowledge and experience. If you're not confident in your abilities, it may be best to have a professional install the seal for you to ensure proper installation and prevent any potential issues.

The Mercury Marine 29478 engine seal is a vital component for maintaining the performance and longevity of your Mercury Marine outboard engine. While the cost may be a consideration, the benefits, such as OEM quality, superior material, enhanced engine performance, and longer engine life, make this investment worthwhile. If you're unsure about installation, consider having a professional do it to ensure proper installation and prevent potential issues.

If you're in need of a new engine seal for your Mercury Marine outboard engine, we recommend purchasing the Mercury Marine 29478 engine seal from a trusted Mercury Marine dealer or authorized service center to ensure authenticity and quality. Proper installation is also crucial, so consider having a professional install the seal if you're not confident in your abilities.

Details:

This is a genuine Mercury Marine OEM Seal, part number 29478. It is designed to create a secure seal within various engine components, preventing leaks and ensuring proper operation. Genuine Mercury Marine OEM part. As a factory original part, it is manufactured to Mercury's precise specifications for material and dimensions, guaranteeing perfect fit reliable performance.

Replaces Part Numbers: 28643. 2026 Classic Revival Marine. Fast Shipping. Brand Mercury Marine, Part Number 29478, Condition NEW, Notes/Other number is 29478.

Designed for Marine engine environments. This seal is a crucial component for maintaining the integrity of your Marine engines systems. Key Features. Unlike aftermarket alternatives, this factory part is built to the exact specifications required for your engine, preventing leaks that can lead costly repairs and downtime.

Ensures a precise, leak-free fit. Please verify fitment for your specific application before purchasing. Maintains pressure and prevents fluid contamination. Choose a genuine Mercury Marine OEM seal to ensure compatibility and reliability.

part #: 29478 prices

• $7.00-$15.19

specifications intengster:

• for makes: Mercury
• brand: Mercury Marine
• mpn: 29478
• part type: Seal Engine

offer intengster:

• availability: In Stock
• best offers: True
• started: February 10, 2026
• options: Ship-to-home
• quantity: 5
• sold: 0

returns intengster:

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

seller intengster:

• city: Spokane, Washington
• # reviews: 0
• rating: 0.0%

payments intengster:

• credit card: Mastercard
• wallet: Paypal
• other

shipping intengster:

• type: Calculated
• service: UPS Ground, UPS 2nd Day Air, UPS Ground Saver
• carrier: UPS
• cost: $7.84
• class: Standard, Expedited, Economy
• transit: 4-11 Days

general intengster:

• condition: New
• Boat Parts > Sterndrive Motors Components > Internal Engine Parts

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