1. Boat Parts In Otsterndriv Sterndrive Prices For Sale.
  2. sku: 4883385547457772
  3. GM 863802-A1

GM 863802-A1 Mpi Boat Engine Thermostat Housing 4.3 262 V6

fits model: Marine, Mercruiser. make: Mercury. year: 2008.

863802-a1 Gm 08 Mercury Mercruiser 4.3 Mpi 262 V6 Marine Boat Engine Thermostat Housing

( Brand: Gm ), ( Manufacturer Part Number: 863802-A1 ), ( 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 863802-A1 thermostat housing is a crucial component designed specifically for the Mercury Mercruiser 4.3 MPI 262 V6 marine boat engine. This housing is engineered to maintain optimal engine temperature, ensuring reliable performance and longevity of the marine engine.

The housing is precision-crafted from high-quality materials, including a durable, corrosion-resistant aluminum exterior. The interior of the housing is designed to accommodate a thermostat and gasket, which regulate the engine's coolant flow to maintain an ideal operating temperature.

The thermostat housing is designed to fit seamlessly into the marine engine's cooling system. It features a threaded inlet and outlet connection, allowing for easy installation and removal of the cooling system hoses. The housing also includes a built-in bleed port, which simplifies the cooling system's air bleeding process, ensuring that all air bubbles are effectively eliminated.

The GM 863802-A1 thermostat housing is designed to meet or exceed the performance standards of the Mercury Mercruiser 4.3 MPI 262 V6 marine engine. It is manufactured to strict tolerances, ensuring a perfect fit and reliable operation. The housing is also tested extensively to ensure that it can withstand the rigors of marine use, including exposure to saltwater, UV radiation, and extreme temperatures.

In summary, the GM 863802-A1 thermostat housing is a critical component of the cooling system for the Mercury Mercruiser 4.3 MPI 262 V6 marine engine. It is engineered to provide reliable temperature regulation, ensuring optimal engine performance and longevity. The housing is made from high-quality materials, featuring a durable aluminum exterior, threaded inlet and outlet connections, and a built-in bleed port. It is precision-crafted to meet or exceed the performance standards of the marine engine and is tested extensively to ensure its ability to withstand the rigors of marine use.

Pros and Cons of Buying a GM 863802-A1 Thermostat Housing for a 08 Mercury Mercruiser 4.3 MPI 262 V6 Marine Boat Engine

1. Pros:

a. Availability: This thermostat housing is widely available in marine parts stores and online marketplaces like Amazon, making it easy to purchase and have it delivered.

b. OEM Part: This thermostat housing is an original equipment manufacturer (OEM) part, which means it is designed specifically for the Mercury Mercruiser 4.3 MPI 262 V6 marine boat engine, ensuring a perfect fit and proper engine function.

c. Prevents Engine Overheating: A defective or worn-out thermostat housing can cause the engine to overheat, potentially leading to significant damage. Replacing the thermostat housing with a new one helps maintain optimal engine temperature and prolongs engine life.

d. Improves Engine Performance: A functioning thermostat housing ensures that coolant flows efficiently through the engine, allowing for better heat distribution and improved engine performance.

2. Cons:

a. Cost: While an OEM part like the GM 863802-A1 thermostat housing is built to last and designed specifically for the engine, it may come with a higher price tag compared to aftermarket alternatives.

b. Installation Complexity: Installing a thermostat housing can be a complex process, requiring the engine to be drained of coolant, disconnected from the electrical system, and carefully removed to access the old housing. This process may require the assistance of a professional mechanic or marine technician.

c. Potential for Additional Repairs: If the thermostat housing is being replaced due to engine overheating, it may be an indication of other underlying engine issues. These additional repairs can add to the overall cost and time investment of the project.

3. Ending Conclusion:

The GM 863802-A1 thermostat housing is an essential component for maintaining optimal engine temperature and performance in a Mercury Mercruiser 4.3 MPI 262 V6 marine boat engine. While the replacement process can be complex and the part may come with a higher price tag compared to aftermarket alternatives, the benefits of using an OEM part include guaranteed engine compatibility, improved engine performance, and extended engine life. Ultimately, investing in a new GM 863802-A1 thermostat housing is a valuable long-term decision for boat owners.

4. Recommendation:

If you own a Mercury Mercruiser 4.3 MPI 262 V6 marine boat engine and suspect that your thermostat housing may be defective or worn out, it is recommended that you replace it with a new GM 863802-A1 thermostat housing. This OEM part guarantees a perfect fit, prolongs engine life, and ensures optimal engine performance. While the installation process may be complex, the long-term benefits of using a high-quality OEM part outweigh the upfront cost and time investment.

Details:

Mounting hardware is only included if it shown in the pictures. 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. What you see in the pictures is what get. Serial Number: 1A085933. Condition: Good used condition.

Thanks -Mike. Shelf 28-12-4-C.

part #: 863802a1 prices

  • $75.00-$95.00

specifications otsterndriv:

  • for models: Marine, Mercruiser
  • for makes: Mercury
  • for years: 2008
  • brand: Gm
  • mpn: 863802-a1
  • part type: Engine Thermostat Housing
  • country of origin: United States

shipping otsterndriv:

  • carrier: USPS, FedEx
  • type: Calculated
  • class: Standard, Expedited
  • transit: 5-8 Days
  • service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery, USPS Priority Mail Express
  • cost: $18.95

general otsterndriv:

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

seller otsterndriv:

  • rating: 99.6%
  • # reviews: 118292
  • city: Huron, Ohio

returns otsterndriv:

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

offer otsterndriv:

  • options: Ship-to-home
  • sold: 0
  • quantity: 1
  • availability: In Stock
  • started: February 26, 2026

payments otsterndriv:

  • credit card: Diners-club
  • wallet: Paypal
  • other
for models: marine, mercruiser, for makes: mercury, for years: 2008, part type: engine thermostat housing, country of origin: united states,
category: boat parts > sterndrive components, sku: 4883385547457772,
Gm 863802-A1 Is Similar To:
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5 offers $75.00–$95.00 USD
  • Used. Offer #1 priced at $75.00 + $15.00 shipping estimate = $90.00* total. +$15.00 shipping
  • Used. Offer #2 priced at $95.00 + $23.89 shipping estimate = $118.89* total. +$23.89 shipping
  • Used. Offer #3 priced at $85.50 + $23.89 shipping estimate = $109.39* total. +$23.89 shipping
  • Used. Offer #4 priced at $100.00 + $18.00 shipping estimate = $118.00* total. +$18.00 shipping
  • Used. Offer #5 priced at $189.00 + $0.00 shipping estimate = $189.00* total. FREE SHIPPING

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