Thermostat Housing Assembly - Mercury 65-150 HP 4 - Stroke (2007-2021) OEM# 18-3633 | WSM 775-65

Thermostat Housing Assembly Mercury 65 - 150 Hp 4-Stroke 07-21 OEM# 18-3633

This WSM thermostat housing assembly is a quality aftermarket replacement part designed for Mercury 4 Cyl 4 Stroke 100 and 5 other compatible models.

It replaces selected OEM reference numbers including 18-3633, 18-3635, 892864T06, 8M0090819 and is suitable for service, repair and rebuild work.

Key Features

• Quality aftermarket replacement part from WSM
• Engineered for dependable fit, function and service life
• Designed for marine and powersports repair and maintenance
• Compatible with 23 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 775-65
• Product: Thermostat Housing Assembly
• OEM Reference: 18-3633, 18-3635, 892864T06, 8M0090819
• Application: Mercury 4 Cyl 4 Stroke 100 and 5 other compatible models

Product Fitment

This part is suitable for the following models:

• Mercury 4 Cyl 4 Stroke 100 – 2007
• Mercury 4 Cyl 4 Stroke 100 – 2008
• Mercury 4 Cyl 4 Stroke 115 – 2007
• Mercury 4 Cyl 4 Stroke 115 – 2008
• Mercury 4 Cyl 4 Stroke 150 – 2009
• Mercury 4 Cyl 4 Stroke 150 – 2010
• Mercury 4 Cyl 4 Stroke 150 – 2011
• Mercury 4 Cyl 4 Stroke 150 – 2012
• Mercury 4 Cyl 4 Stroke 150 – 2013
• Mercury 4 Cyl 4 Stroke 150 – 2014
• Mercury 4 Cyl 4 Stroke 150 – 2015
• Mercury 4 Cyl 4 Stroke 150 – 2016
• Mercury 4 Cyl 4 Stroke 150 – 2017
• Mercury 4 Cyl 4 Stroke 150 – 2018
• Mercury 4 Cyl 4 Stroke 150 – 2019
• Mercury 4 Cyl 4 Stroke 150 – 2020
• Mercury 4 Cyl 4 Stroke 150 – 2021
• Mercury 4 Cyl 4 Stroke 80 – 2007
• Mercury 4 Cyl 4 Stroke 80 – 2008
• Mercury 4 Cyl 4 Stroke EFI 75 – 2007
• Mercury 4 Cyl 4 Stroke EFI 75 – 2008
• Mercury 4 Cyl 4 Stroke EFI 90 – 2007
• Mercury 4 Cyl 4 Stroke EFI 90 – 2008

Why Buy WSM

WSM is a trusted manufacturer of aftermarket marine and powersports parts, known for dependable quality, strong fitment coverage and workshop-ready replacement components.

About the Mercury 135-200 HP Outboard Engines

Mercury and Mariner 135-200 HP outboard engines are widely used across recreational and performance boating applications. These engines have long-standing aftermarket support, making quality replacement gaskets, ignition, fuel and powerhead parts important for service and rebuild work.

You May Also Need

Browse related parts for compatible models:

• Water Pump Impeller Mercruiser / Mercury / Mariner / Honda 30 - 350 Hp OEM# 19210-ZW1-003 – 700-155
• Water Pump Service Kit Honda / Mercury / Mariner 30 - 350 Hp OEM# 06192-ZW1-305 – 725-155
• Tilt Tube Stainless Steel Mercury / Mariner / Force 65 - 300 Hp OEM# 826125A1 – 986-165
• Gasket Water Pump Force / Mercury / Mariner / Mercruiser 40 - 300 Hp OEM# 27-817277 – 447-329

Please use the fitment guide, OEM references and images to confirm this is the correct part before ordering.