GM 864398 Mpi Boat Engine Thermostat Housing 4.3 262 V6

( Brand: Gm ), ( Manufacturer Part Number: 864398 ), ( Part Type: Engine Thermostat Housing ), ( Country Of Origin: United States )

Review GM Mercury 4.3 Mpi 262 V6 Boat Engine Thermostat Housing fits MERCRUISER MARINE 2008

The GM Part Number 864398 08 is a thermostat housing specifically designed for Mercury Mercruiser 4.3 MPI 262 V6 marine boat engines. This thermostat housing is an essential component of the engine cooling system, as it houses the engine thermostat that regulates the engine's cooling temperature.

The housing is made of cast aluminum, which provides excellent heat dissipation and durability. It features a unique design with a gasket surface that ensures a tight seal, preventing coolant leaks and maintaining the engine's optimal cooling performance. The housing also includes a built-in bypass tube for improved cooling efficiency.

The thermostat housing is designed to fit Mercury Mercruiser 4.3 MPI 262 V6 marine boat engines, and it is direct replacement for the original equipment thermostat housing. It comes with a new gasket, making the installation process hassle-free and straightforward.

The thermostat housing is an essential upgrade for boat owners who want to ensure the longevity of their engine and maintain optimal performance. By regulating the engine's cooling temperature, it helps prevent overheating, which can cause damage to the engine components. Additionally, a properly functioning cooling system helps improve fuel efficiency and reduces emissions.

Overall, the GM Part Number 864398 08 thermostat housing is a high-quality, reliable, and durable component that is essential for the proper functioning of Mercury Mercruiser 4.3 MPI 262 V6 marine boat engines. It is designed to provide excellent cooling performance, prevent leaks, and ensure the longevity of the engine.

Pros and Cons of Buying a GM 864398 08 Mercury Mercruiser 4.3 MPI 262 V6 Marine Boat Engine Thermostat Housing

a) OEM Part: This thermostat housing is a genuine original equipment manufacturer (OEM) part produced by General Motors for Mercury Mercruiser 4.3 MPI 262 V6 marine boat engines.

b) Reliability: As an OEM part, it is designed to meet the specifications of the engine and provide reliable performance.

c) Fits Perfectly: The thermostat housing is engineered to fit precisely in the engine, ensuring a secure installation.

d) Durability: The housing is made of high-quality materials that can withstand the harsh marine environment and the extreme temperatures that marine engines encounter.

e) Enhances Engine Performance: A functioning thermostat housing is crucial for proper engine temperature regulation, which is essential for optimal engine performance and longevity.

a) Cost: The price of the OEM thermostat housing may be higher than aftermarket alternatives.

b) Availability: Depending on the supplier and location, the thermostat housing may not always be readily available, which could lead to longer waiting times for boat owners.

c) Complex Installation: Installing a thermostat housing in a marine engine can be a complex process, requiring specialized tools and knowledge. Boat owners may need to pay for professional installation or spend time learning the process.

When considering purchasing a GM 864398 08 Mercury Mercruiser 4.3 MPI 262 V6 Marine Boat Engine Thermostat Housing, it's essential to weigh the pros and cons. The OEM part offers reliability, perfect fit, durability, and enhanced engine performance but comes at a higher cost and may not always be readily available. If boat owners prioritize the peace of mind that comes with a genuine OEM part and are willing to pay the price, then this thermostat housing is an excellent choice. However, for those on a tighter budget, an aftermarket alternative may be a more viable option. Ultimately, the decision depends on the individual boat owner's priorities and needs.

Details:

What you see in the pictures is what get. Part was removed from a 2008 MerCruiser 4.3 MPI Marine engine. Please look at all pictures and read entire before buying. I will do my best to resolve the issue.

Look at pictures closely and ask any questions, I try to describe parts as best can. Shelf 28-12-4-C. Thanks -Mike. Serial Number: 1A085933.

Mounting hardware is only included if it shown in the pictures. Condition: Good used condition.

part #: 864398 prices

• $75.00-$100.00

specifications otsterndriv:

• for models: Marine, Mercruiser
• for makes: Mercury
• for years: 2008
• brand: Gm
• mpn: 864398
• part type: Engine Thermostat Housing
• country of origin: United States

general otsterndriv:

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

seller otsterndriv:

• rating: 99.6%
• city: Huron, Ohio
• # reviews: 118257

returns otsterndriv:

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

payments otsterndriv:

• credit card: Diners-club
• wallet: Apple-pay
• other

offer otsterndriv:

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

shipping otsterndriv:

• class: Standard, Expedited
• service: FedEx Ground / FedEx Home Delivery, USPS Ground Advantage, USPS Priority Mail
• transit: 2-6 Days
• type: Calculated
• cost: $22.98
• carrier: FedEx, USPS

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