MERCURY 6187A4 Cylinder Head 3.7 470 170

( Manufacturer Part Number: 6187A4 ), ( Part Type: Hp Cylinder Head ), ( Country Of Origin: United States ), ( California Prop 65 Warning: Warning )

Review MERCURY Cylinder Head 3.7 470 170 Hp fits MERCRUISER

The Mercury 6187A4 cylinder head is a crucial component of the Mercruiser 3.7 liter Alpha One engine, capable of delivering an impressive 170 horsepower. This cylinder head is meticulously engineered to ensure optimal engine performance and efficiency.

The head features four valves per cylinder, arranged in a quiet, compact overhead valve (OHV) configuration. The valves are actuated by robust, durable pushrods and rocker arms. The intake valves are sized at 2.0 inches, while the exhaust valves measure 1.5 inches in diameter. These dimensions facilitate efficient gas exchange within the combustion chamber, contributing to the engine's impressive power output.

The combustion chambers are designed with a squish band, which helps to maintain proper air-fuel mixture and ensure consistent combustion. The head also includes a high-performance, single-port fuel injector that delivers precise amounts of fuel into each cylinder for superior combustion efficiency.

The Mercury 6187A4 cylinder head boasts a durable, corrosion-resistant design. It is constructed from premium aluminum alloy, which offers excellent heat dissipation properties. The head also includes a robust cooling system, featuring a large, efficient water jacket, to help maintain optimal engine temperature and prevent overheating.

The cylinder head's smooth, polished surfaces contribute to reduced friction and improved engine efficiency. The head is also equipped with a reliable, long-lasting valve guide and seal system, ensuring consistent sealing and minimizing the risk of leaks.

In conclusion, the Mercury 6187A4 cylinder head is a high-performance, reliable, and durable component of the Mercruiser 3.7 liter Alpha One engine. Its advanced design features, including robust valve train, efficient combustion chamber, and effective cooling system, contribute to the engine's impressive power output and efficiency. This cylinder head is an excellent choice for boaters and marine enthusiasts seeking maximum performance and reliability from their engine.

The Mercury 6187A4 cylinder head is a component used in Mercury outboard engines with a displacement of 3.7 liters and a power output of 170 horsepower. This cylinder head is designed for use in the MerCruiser 470 series engines. Here are some potential pros and cons of buying this cylinder head:

1. Increased horsepower: This cylinder head is designed to provide increased power compared to the standard cylinder head. This can lead to improved engine performance and faster boat speeds.

2. Durability: Mercury is a reputable engine manufacturer, and their parts are known for their durability and reliability. This cylinder head is likely to be of high quality and able to withstand the rigors of heavy use.

3. Improved fuel efficiency: The cylinder head may be designed with features that improve fuel efficiency, which can lead to cost savings over time.

4. Availability: Mercury is a well-known brand, and their parts are widely available from marine supply stores and online retailers.

1. Cost: The Mercury 6187A4 cylinder head is likely to be more expensive than a standard cylinder head. This may be a consideration for budget-conscious boat owners.

2. Complex installation: Installing a cylinder head can be a complex and time-consuming process. It may require specialized tools and expertise, and it may be necessary to remove other engine components to access the cylinder head.

3. Potential compatibility issues: It's important to ensure that this cylinder head is compatible with your specific engine model and configuration. Installing an incompatible part could lead to engine damage or other issues.

In conclusion, the Mercury 6187A4 cylinder head offers increased power, durability, and potentially improved fuel efficiency. However, it comes with a higher cost and a complex installation process. If you're looking to improve the performance of your MerCruiser 470 series engine and have the budget and expertise to install the cylinder head, it may be a worthwhile investment. However, if you're on a tight budget or not comfortable with the installation process, it may be best to stick with a standard cylinder head.

Details:

part #: 6187a4 prices

• $200.00-$664.05

specifications intengster:

• for models: Mercruiser
• for makes: Mercury
• mpn: 6187a4
• part type: Hp Cylinder Head
• country of origin: United States
• california prop 65 warning: Warning

shipping intengster:

• service: Economy
• class: Economy
• transit: 5-10 Days
• cost: $0.00
• type: Fixed

offer intengster:

• options: Ship-to-home
• quantity: 1
• sold: 0
• started: February 13, 2026
• best offers: True
• availability: In Stock

seller intengster:

• # reviews: 27568
• rating: 99.7%
• city: Burley, Idaho

general intengster:

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

returns intengster:

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

payments intengster:

• other
• wallet: Paypal
• credit card: Discover

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