1. Boat Parts In Otsterndriv Sterndrive Prices For Sale.
  2. sku: 4875424355390602
  3. MERCURY MARINE 859-6387-C1

MERCURY MARINE 859-6387-C1 Block 3.7

fits model: Mercruiser. make: Mercury.

859-6387-c1 Mercury Marine Mercruiser 3.7 L Long Block

( Brand: Mercury Marine ), ( Manufacturer Part Number: 859-6387-C1 ), ( Part Type: Block ), ( Country Of Origin: United States )

Review MERCURY MARINE 3.7 Long Block fits MERCRUISER

The Mercury Marine 859-6387-C1 Mercruiser 3.7 Block is a high-performance engine component designed for marine applications. This block is part of Mercury Marine's sterndrive and outboard engine offerings, and it is specifically engineered to provide exceptional durability, reliability, and power.

The Mercruiser 3.7 block is a cast iron unit, which is known for its strength and ability to withstand the rigors of marine use. The block features a wet-sump oiling system, which ensures that the engine's crankshaft and other critical components are consistently lubricated to reduce wear and tear. The block also includes an integral water pump, which helps to keep the engine cool during operation.

The Mercury Marine 859-6387-C1 block is designed to accommodate a three-cylinder, in-line engine configuration. It has a bore size of 3.48 inches and a stroke length of 3.4 inches, resulting in a total displacement of 3.7 liters or 226 cubic inches. The block is designed to accept a crankshaft with a 180-degree timing angle and a counterweighted rotating assembly to optimize power output.

The Mercruiser 3.7 block is designed to meet the latest emission regulations, with features such as a closed-deck design that helps to reduce emissions and improve combustion efficiency. It also includes a machined surface for the installation of a nitrous oxide injection system, which can be used to boost power output in high-performance applications.

The Mercury Marine 859-6387-C1 Mercruiser 3.7 Block is a precision-machined component that is designed to fit perfectly into the engine assembly. It is manufactured to strict tolerances to ensure optimal performance, and it is backed by Mercury Marine's industry-leading warranty program. Whether you are building a new marine engine or rebuilding an existing one, this block is an essential component that will help you achieve the power, reliability, and durability you need for your marine application.

Mercury Marine 859-6387-C1 Mercruiser 3.7 Block: A Detailed Analysis

The Mercury Marine 859-6387-C1 Mercruiser 3.7 block is a popular choice among boat owners for its reliability and performance. However, like any other engine component, it comes with its advantages and disadvantages. In this analysis, we will discuss the pros and cons of buying this Mercruiser 3.7 block to help you make an informed decision.

Pros:

1. High Performance: The Mercruiser 3.7 block is known for its high performance. It delivers impressive power output, making it an excellent choice for those seeking a powerful and efficient engine.

2. Durability: Mercruiser blocks are renowned for their durability. The 3.7 block is no exception. It can withstand the harsh marine environment and last for an extended period with proper maintenance.

3. Availability: The 3.7 block is widely available in the market, making it easy to find and purchase. This is a significant advantage for boat owners who need a replacement engine block urgently.

4. Affordability: Compared to other high-performance engine blocks, the Mercruiser 3.7 block is relatively affordable. This makes it an attractive option for boat owners on a budget.

Cons:

1. Complexity: The 3.7 block is a complex engine component. Installing or replacing it requires a high level of technical expertise. This can add to the cost of ownership.

2. Maintenance: The 3.7 block requires regular maintenance to keep it in top condition. Failure to maintain it properly can lead to significant damage and high repair costs.

3. Compatibility: The Mercruiser 3.7 block may not be compatible with all boat models. It is essential to ensure that the block is compatible with your boat before making a purchase.

4. Fuel Consumption: The 3.7 block consumes more fuel than some other engine blocks in its class. This can add to the operating costs of your boat.

Conclusion:

The Mercury Marine 859-6387-C1 Mercruiser 3.7 block is a high-performance engine component that offers durability, availability, and affordability. However, it comes with some disadvantages, including complexity, maintenance requirements, compatibility issues, and higher fuel consumption. Ultimately, the decision to buy this engine block depends on your specific needs, technical expertise, and budget. If you require a powerful, efficient, and durable engine block for your boat and have the necessary expertise to maintain it, then the Mercruiser 3.7 block is an excellent choice. However, if you are on a tight budget or prefer a simpler engine component, you may want to explore other options.

Recommendation:

If you are in the market for a high-performance engine block for your boat and are confident in your technical expertise, the Mercury Marine 859-6387-C1 Mercruiser 3.7 block is a great option. However, if you are unsure about your technical abilities or prefer a simpler engine component, you may want to consider a less complex engine block or seek the assistance of a professional mechanic. Additionally, ensure that you have a clear understanding of the compatibility requirements and maintenance requirements before making a purchase.

Details:

Cylinder 1 - 124 psi, 2 125 3/4 123 psi. 77 87 MerCruiser 3.7 L compression tested long block.

part #: 8596387c1 prices

  • $262.50-$1200.00

specifications otsterndriv:

  • for models: Mercruiser
  • for makes: Mercury
  • brand: Mercury Marine
  • mpn: 859-6387-c1
  • part type: Block
  • country of origin: United States

payments otsterndriv:

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

shipping otsterndriv:

  • type: Fixed
  • class: Freight
  • service: Flat Rate Freight
  • cost: $400.00

offer otsterndriv:

  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • started: February 25, 2026
  • quantity: 1

returns otsterndriv:

  • policy: No Returns

general otsterndriv:

  • condition: Used
  • Boat Parts > Sterndrive Motors Components > Other

seller otsterndriv:

  • rating: 99.0%
  • # reviews: 1266
  • city: Hanover, Maryland
for models: mercruiser, for makes: mercury, part type: block, country of origin: united states,
category: boat parts > sterndrive components, sku: 4875424355390602,
Mercury Marine 859-6387-C1 Is Similar To:
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3 offers $262.50–$1200.00 USD
  • Used. Offer #1 priced at $622.50 + $200.00 shipping estimate = $822.50* total. I will do my best to resolve the issue. Shelf 27-2-1-A.+$200.00 shipping
  • For parts or not working. Offer #2 priced at $262.50 + $250.00 shipping estimate = $512.50* total. REMOVED FROM.+$250.00 shipping
  • Used. Offer #3 priced at $1200.00 + $400.00 shipping estimate = $1600.00* total. 77 87 MerCruiser 3.7 L compression tested long block.+$400.00 shipping

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