Thermostat Housing Assembly Fit for Mercury Marine 135-300 HP 135-300 Verado Outboard Motors OEM Parts 892864T04 8M0174561 Sierra 18-3631 Boat Engine

Detailed Fitment Information (By Horsepower)135HP Model: VERADO (4-Stroke, 4 Cylinder) Applicable Years: 2006, 2007 Serial Number Ranges: 0P419487 - 0P514868 1B227000 - 1B381711 1B381712 - 1B517158 0P514869 & Up 1B517159 & Up 150HP Model: VERADO (4-Stroke, 4 Cylinder) Applicable Years: 2006, 2007 Serial Number Ranges: 0P419487 - 0P514868 1B227000 - 1B381711 1B381712 - 1B517158 0P514869 & Up 1B517159 & Up 175HP Model: VERADO (4-Stroke, 4 Cylinder) Applicable Years: 2006, 2007 Serial Number Ranges: 0P419487 - 0P514868 0P464488 - 1B227000 - 1B517158 1B227000 - 1B381711 1B381712 - 1B517158 0P514869 & Up 1B517159 & Up 200HP VERADO (4 Cylinder, 4-Stroke) Applicable Years: 2005, 2006, 2007, 2011 - 2014 Serial Number Ranges: 0P514869 & Up 1B517159 & Up 0T980000 - 1B226999 1B227000 - 1B381711 1B381712 - 1B517433 1B517434 & Up VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 0P409357 - 2B144122 2B144123 & Up PRO VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B034840 - 2B144122 2B144123 & Up 225HP Model: VERADO (4-Stroke, 6 Cylinder) Applicable Years: 2005, 2006, 2007, 2011 - 2014 Serial Number Ranges: 0P409357 - 2B144122 2B144123 & Up 0T980000 - 1B226999 1B227000 - 1B381711 1B381712 - 1B517433 1B517434 & Up 250HP VERADO (6 Cylinder, 4-Stroke) Applicable Years: 2005, 2006, 2007, 2011 - 2014 Serial Number Ranges: 0P409357 - 2B144122 2B144123 & Up 0T980000 - 1B226999 1B227000 - 1B381711 1B381712 - 1B517433 1B517434 & Up PRO VERADO (6 Cylinder, 4-Stroke) Applicable Years: 2006, 2010 - 2011 Serial Number Ranges: 1B830170 - 2B144122 2B144123 & Up 1B830170 & Up 275HP Model: VERADO (4-Stroke, 6 Cylinder) Applicable Years: 2005, 2006, 2007, 2011 - 2014 Serial Number Ranges: 0P409357 - 2B144122 2B144123 & Up 0T980000 - 1B226999 1B227000 - 1B381711 1B381712 - 1B517433 1B517434 & Up 300HP VERADO (6 Cylinder, 4-Stroke) Applicable Years: 2006 - 2007, 2011 - 2014 Serial Number Ranges: 0P520553 - 2B144122 1B517434 - 2B144122 2B144123 & Up 1B517434 & Up PRO VERADO (6 Cylinder, 4-Stroke) Applicable Years: 2006, 2010 - 2011 Serial Number Ranges: 1B830170 - 2B144122 2B144123 & Up 1B830170 & Up 350HP VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B141617 & Up PRO VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B141124 & Up 400HP VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B141124 & Up PRO VERADO (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B618256 & Up RACING (6 Cylinder, 4-Stroke) Serial Number Ranges: 2B141124 & Up Purchase TipsPlease be sure to check your engine's horsepower, model, year of manufacture, and serial number to ensure they fully match the above information. This will guarantee smooth installation and optimal performance of the product. If you have any questions, feel free to contact customer service at any time.

• Vehicle Fitment: Compatible with Mercury Marine 135 HP 135 Verado 150 HP 150 Verado 175 HP 175 Verado 200 HP 200 Verado 225 HP 225 Verado 250 HP 250 Verado 275 HP 275 Verado 300 HP 300 Verado
• Replace Part Number: OE# 892864T04 8M0174561 Sierra 18-3631
• Functions: Prevents Engine Overheating and Temperature Instability, A high-precision thermostat precisely regulates coolant flow through the radiator to maintain optimal engine operating temperature—effectively mitigating both overheating and suboptimal thermal conditions, as well as eliminating erratic coolant temperature gauge readings.
• Premium Quality: The thermostat features a robust sealing system comprising durable plastic and elastomeric components, reinforced by high-tensile springs. This design ensures reliable leak prevention, maintains structural integrity under elevated operating pressures, mitigates engine wear, enhances thermal management efficiency, and contributes to extended operational stability and service life.
• Customer Service: All products undergo 100% testing and inspection prior to delivery. We offer customers a one-year warranty, and should any product issue arise, we encourage prompt communication with our support team for timely resolution