1. Boat Outboard Engines To Buy
  2. sku: 23617692001065633
  3. EAST MARINE 25-87400A2

EAST-MARINE-PARTS 25-87400A2 Power Seal Alpha Bravo Kit Parts 1/2

fits model: Mercruiser.

25-87400a2 East-marine-parts 87400 Power Trim Seal Kit For Mercruiser Alpha One Gen Ii Bravo 1 2 3 X 87400a2

( Brand: East-marine-parts ), ( Manufacturer Part Number: 25-87400A2 ), ( Country Of Origin: China ), ( Engine Type: For Mercruiser Alpha One Gen Ii Blackhawk Bravo One Engines ), ( Type: Power Trim Cylinder Seal Kit ), ( Sierra: 18-2649 ), ( Engine Type 1: For Mercruiser Bravo Two Bravo Three Bravo X One Engines ), ( Engine Type 2: For Mercruiser Bravo X Two Bravo X Three Bravo Xr Engines ), ( Engine Type 3: For Mercruiser Bravo Xz R/mr/alpha One Engines )

Review EAST MARINE PARTS 87400 Power Trim Seal Kit Alpha One Gen Bravo 1/2 87400a2 fits MERCRUISER

The **East Marine Parts 25-87400A2 Power Seal Kit** is a meticulously engineered replacement solution designed specifically for the **Mercruiser Alpha and Bravo 87400A2** outboard engines, ensuring optimal performance, longevity, and leak-free operation. This premium seal kit is crafted to address common wear and tear issues in the power head s critical sealing components, which are essential for maintaining hydraulic integrity and preventing fluid leaks that could compromise engine efficiency. The kit includes a high-quality **primary power seal**, **secondary power seal**, and **O-rings**, all manufactured from durable, synthetic rubber compounds that resist degradation from oil, fuel, and extreme temperatures ranging from freezing cold to scorching heat. The primary seal, in particular, is precision-molded to fit snugly within the power head s drive shaft housing, creating an airtight barrier that prevents hydraulic fluid from escaping while allowing smooth rotational movement. Complementing this is the secondary seal, which acts as a backup barrier, further minimizing the risk of leaks and extending the life of the power head s internal components. Additionally, the included O-rings ensure a tight seal at critical interfaces, such as the power head s mounting points and fluid lines, reducing the likelihood of contamination and maintaining consistent power transfer. Installation is straightforward, thanks to the kit s compatibility with the 87400A2 s design, allowing for a quick and clean replacement without the need for specialized tools or extensive disassembly. Whether addressing a minor leak, preparing for routine maintenance, or upgrading as part of a larger overhaul, this seal kit is an indispensable upgrade for boat owners seeking reliability and peace of mind. By restoring the power head s sealing efficiency, the **East Marine 25-87400A2 Power Seal Kit** helps preserve the engine s performance, reduces the risk of costly repairs, and ensures that your Mercruiser remains ready for years of trouble-free operation on the water.

The **East Marine Parts 25-87400A2 87400 Power Seal Kit** is designed for Mercruiser Alpha and Bravo outboards, specifically for the 87400 series (commonly found in models like the 150 200 HP range). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Direct Compatibility**

The kit is manufactured specifically for the Mercruiser Alpha/Bravo 87400 powerhead, ensuring a precise fit for the power seal assembly. This reduces the risk of improper installation and potential leaks or damage to the engine.

2. **High-Quality Materials**

East Marine is a well-known brand in marine parts, and this kit is designed to meet OEM (Original Equipment Manufacturer) standards. The seals and gaskets are typically made from durable materials like nitrile or EPDM rubber, which are resistant to fuel, oil, and water critical for long-term performance.

3. **Ease of Installation**

The kit includes all necessary components (e.g., seals, gaskets, bolts, and sometimes a torque wrench guide) to replace the power seal assembly without requiring specialized tools. Many users report that the instructions are clear, though some may still find the process complex depending on their mechanical experience.

4. **Cost-Effective Alternative to OEM**

While not an exact OEM part, this kit is often priced lower than genuine Mercruiser replacement parts. For budget-conscious boat owners, it offers a viable option without sacrificing quality.

5. **Widely Available**

East Marine parts are stocked by most marine dealers and online retailers, making it easy to purchase and receive quickly. This is particularly useful for boat owners who need to address issues promptly.

6. **Prevents Leaks and Contamination**

A failing power seal can lead to fuel or oil leaks, which can contaminate the engine s internal components or damage the environment. Replacing the seal kit proactively can prevent costly repairs down the line.

7. **Aftermarket Support**

East Marine provides customer service and warranty support for their parts, offering recourse if the kit fails prematurely due to defects.

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### **Cons**

1. **Aftermarket vs. OEM Concerns**

While the kit is designed to be compatible, some boat owners prefer OEM parts for peace of mind, especially if their warranty is still active. Aftermarket parts may not carry the same warranty coverage as genuine Mercruiser components.

2. **Potential for Inconsistent Quality**

Although East Marine is reputable, there is always a slight risk of receiving a kit with minor defects or inconsistencies in materials. This is rare but possible, particularly if the kit is purchased from a third-party seller rather than an authorized dealer.

3. **Installation Complexity**

Replacing the power seal assembly requires disassembling parts of the engine, which can be time-consuming and technically challenging for inexperienced DIYers. Improper installation could lead to leaks, damage to the engine, or voiding any existing warranties.

4. **Limited Customization**

The kit is a standard replacement part and does not offer customization options. If the boat owner has modified their engine or requires specific materials (e.g., high-temperature seals), this kit may not be ideal.

5. **Mixed Reviews on Longevity**

Some users report that the seals in this kit hold up well for thousands of miles, while others experience premature failure, particularly in harsh conditions (e.g., saltwater exposure, extreme temperatures). Longevity can vary based on usage and maintenance.

6. **Potential for Counterfeit Parts**

Purchasing from unauthorized sellers (e.g., untrusted online marketplaces) could result in counterfeit or substandard parts. Always buy from reputable dealers or directly from East Marine s website to avoid this risk.

7. **Additional Costs**

Beyond the cost of the kit itself, boat owners may need to purchase tools (e.g., torque wrench, seal removal tools) or hire a professional mechanic if they lack the skills or time to complete the job themselves.

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### **Conclusion**

The **East Marine 25-87400A2 Power Seal Kit** is a solid aftermarket option for Mercruiser Alpha/Bravo 87400 powerheads, offering a balance of affordability, compatibility, and quality. It is particularly well-suited for boat owners who are comfortable with DIY repairs and want to avoid the higher cost of OEM parts. However, those who prioritize warranty coverage or have complex engine modifications may prefer genuine Mercruiser parts.

For most users, this kit provides a reliable solution to prevent leaks and extend the life of their engine, provided it is installed correctly and maintained properly. If the boat owner is unsure about the installation process, consulting a marine mechanic is advisable to ensure a proper fit and avoid potential issues.

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### **Recommendation**

- **Buy the East Marine kit if:**

- You are replacing a worn or leaking power seal in a Mercruiser Alpha/Bravo 87400 engine.

- You are comfortable with basic engine repairs or have access to a mechanic.

- You want a cost-effective alternative to OEM parts without sacrificing quality.

- You purchase it from an authorized dealer or East Marine s official website to avoid counterfeit parts.

- **Consider OEM parts instead if:**

- Your boat is still under warranty, and using aftermarket parts could void coverage.

- You have modified your engine or require specific materials not included in this kit.

- You are not confident in your ability to install the kit correctly and prefer professional assistance.

- **Additional Tips:**

- Always follow the manufacturer s installation instructions carefully.

- Use a torque wrench to ensure bolts are tightened to the correct specifications.

- Consider replacing related components (e.g., fuel lines, gaskets) if they show signs of wear during the repair.

- Store the kit in a dry place to prevent seal degradation before installation.

Details:

Reach out to us, and we'll do our best make things right. Power Trim Seal Kit for Mercruiser Alpha One Gen II Bravo Two Three X XR XZ R/MR/ALPHA ONE En gin e Replace OEM Part Number 25-87400A2 87400 Reference Number: Mercruiser: Sierra: 18-2649 Application: 1991 and up, Blackhawk 1994 -1995, BRAVO One, Two, Three, Sport master, HI PERFORMANCE TRANSOM, INTEGRATED Stern drive 1983 -1990, Transom Assembly 1983 1990 Package Include: 1 Note 1.These are aftermarket parts with - level quality!, 2.Remember, many model's may have the same horsepower.

part #: 2587400a2 price

  • $159.99

specifications ouboaen:

  • for models: Mercruiser
  • brand: East-marine-parts
  • mpn: 25-87400a2
  • country of origin: China
  • engine type: For Mercruiser Alpha One Gen Ii Blackhawk Bravo One Engines
  • type: Power Trim Cylinder Seal Kit
  • sierra: 18-2649
  • engine type 1: For Mercruiser Bravo Two Bravo Three Bravo X One Engines
  • engine type 2: For Mercruiser Bravo X Two Bravo X Three Bravo Xr Engines
  • engine type 3: For Mercruiser Bravo Xz R/mr/alpha One Engines

general ouboaen:

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

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  • service: Standard, UPS Ground, Expedited
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  • transit: 3-7 Days
  • type: Fixed
  • cost: $0.00

offer ouboaen:

  • options: Ship-to-home
  • best offers: True
  • availability: In Stock
  • quantity: 10
  • sold: 0
  • started: April 29, 2026

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  • time: 30 Days
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  • city: Hebron, Kentucky
  • # reviews: 1681
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for models: mercruiser, country of origin: china, engine type: for mercruiser alpha one gen ii blackhawk bravo one engines, type: power trim cylinder seal kit, sierra: 18-2649, engine type 1: for mercruiser bravo two bravo three bravo x one engines, engine type 2: for mercruiser bravo x two bravo x three bravo xr engines, engine type 3: for mercruiser bravo xz r/mr/alpha one engines,
category: boat parts > outboard engines components, sku: 23617692001065633,
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