MERCRUISER 996-9451A2 Cylinder Head 470 966-6187A4 4CYL 488 3.7L 170HP 165HP 190HP

( Brand: Mercruiser ), ( Part Type: Cylinder Head ), ( Manufacturer Part Number: 996-9451A2 )

Review MERCRUISER 470 Cylinder Head 4cyl 488 3.7l 170hp 165hp 190hp fits 1976-89

The Mercruiser 996-9451A2 470 Cylinder Head is a crucial component of the Mercruiser 4-cylinder 3.7L in-line engine, specifically those with model numbers 966-6187A4, 488, and a horsepower output of 170hp, 165hp, or 190hp. These engines were produced from 1976 to 1989.

The cylinder head is designed with a 470 series combustion chamber configuration, which optimizes the air-fuel mixture for efficient combustion and maximum power output. It features a durable, cast-iron construction, ensuring longevity and resistance to high temperatures and pressures. The head also includes four valves per cylinder, operated by a single overhead camshaft.

The intake and exhaust ports are meticulously designed to provide optimal flow rates for the intake charge and exhaust gases. The intake ports are generously sized to ensure an ample supply of air-fuel mixture for efficient combustion. The exhaust ports are carefully shaped to minimize backpressure and maximize exhaust flow, contributing to improved engine performance.

The head is also equipped with hardened valve seats, ensuring a long-lasting, leak-free seal between the valves and cylinder head. The valves themselves are made from durable, heat-resistant materials, allowing them to withstand the rigors of continuous operation in a marine environment.

The 996-9451A2 cylinder head also includes a high-performance cooling system, featuring large coolant passages that efficiently transfer heat away from the combustion chamber. This cooling system not only helps maintain optimal engine temperature but also prevents damage from thermal stress and ensures the longevity of the engine components.

Additionally, the cylinder head is designed to meet the stringent emission regulations of its time. It includes a combination of mechanically operated and electronically controlled emission control systems, ensuring efficient fuel combustion and reduced emissions.

In summary, the Mercruiser 996-9451A2 470 Cylinder Head is a high-performance, durable component of the Mercruiser 4-cylinder 3.7L in-line engine. Its optimized combustion chamber design, sturdy cast-iron construction, efficient cooling system, and advanced emission control systems make it a reliable and powerful choice for marine applications from 1976 to 1989.

The MerCruiser 996-9451A2 470 Cylinder Head and the associated engine models 966-6187A4 4cyl, 488, 3.7L, 170hp, 165hp, and 190hp are commonly used in recreational boats for their reliability and power. Here are some pros and cons of buying this engine:

1. Powerful: This engine delivers a decent power output, making it suitable for medium-sized boats and watercraft.

2. Versatile: It comes in different horsepower options (165hp, 170hp, and 190hp), allowing boat owners to choose the one that best fits their needs.

3. Durable: MerCruiser engines are known for their durability and longevity, making them a popular choice for boat owners.

4. Reliable: MerCruiser engines have a reputation for being reliable and require minimal maintenance.

5. Wide Availability: Replacement parts and accessories for this engine are widely available, making it easier to maintain and repair.

1. Expensive: MerCruiser engines are generally more expensive than other brands, which may be a deterrent for some boat owners.

2. Complex: The engine's design is complex, which can make repairs and maintenance more challenging for some boat owners.

3. Fuel Consumption: MerCruiser engines consume more fuel than some other brands, which can add to the operating costs.

4. Weight: This engine is heavier than some other options, which can impact the boat's fuel efficiency and performance.

The MerCruiser 996-9451A2 470 Cylinder Head and associated engine models offer powerful performance, durability, and reliability. However, they come with a higher price tag, complex design, and higher fuel consumption compared to some other options. If power, reliability, and a reputation for durability are top priorities, this engine may be worth the investment. On the other hand, if budget is a concern, or if you prefer a simpler engine design, you may want to consider other options.

If you are in the market for a reliable and powerful engine for your recreational boat, the MerCruiser 996-9451A2 470 Cylinder Head and associated engine models are worth considering. Be prepared for a higher initial investment and ongoing maintenance costs. It is also recommended to consult with a professional mechanic or MerCruiser dealer to ensure that this engine is the best fit for your specific boating needs.

Details:

3.7L 2 BBL. MERCURY 224 I/L4 1988 -1989. These are used parts. Used parts may have cosmetic issues scratches, missing paint, faded plastic, pitting, rust, minor dents dings, etc. The condition of this item is as described in the and visible picture. 170hp 2 BBL. MERCURY 224 I/L4 1985 -1986.

Freshwater used part. Good Condition, Original Paint. MerCruiser 470 Cylinder Head 966-6187A4 4cyl 488 3.7L 170hp 165HP 190hp 1976-89: Item Details Assembly D3VE-A2A. The compatibility statements or suggestions in this listing is my best guess based on the quick research we did for item.

165hp 2 BBL. MERCURY 224 I/L4 1987.

part #: 9969451a2 prices

• $100.00-$399.99

specifications vesselveep:

• for years: 1976-89
• brand: Mercruiser
• part type: Cylinder Head
• manufacturer part number: 996-9451A2

payments vesselveep:

• credit card: Discover
• other
• wallet: Google-pay

returns vesselveep:

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

offer vesselveep:

• quantity: 1
• started: February 17, 2025
• options: Ship-to-home
• availability: In Stock
• sold: 0

seller vesselveep:

• # reviews: 5155
• rating: 100.0%
• city: Byron Center, Michigan

shipping vesselveep:

• type: Calculated
• carrier: UPS
• cost: $87.46
• class: Standard
• service: UPS Ground
• transit: 4-8 Days

general vesselveep:

• Parts Accessories > Boat Parts > Other
• condition: Used

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