Thermostat Kit - Johnson / Evinrude 175 / 235 HP V6 Cross Flow (1977-1985) OEM# 18-3674 | WSM 780-150

Thermostat Kit Johnson / Evinrude 175 / 235 Hp V6 Cross Flow 77-85 OEM# 18-3674

This WSM thermostat kit is a quality aftermarket replacement part designed for Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 and 1 other compatible model.

It replaces selected OEM reference numbers including 18-3674 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 11 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 780-150
• Product: Thermostat Kit
• OEM Reference: 18-3674
• Application: Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 and 1 other compatible model

Product Fitment

This part is suitable for the following models:

• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1977
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1978
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1979
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1980
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1981
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1982
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1983
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1984
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 175 – 1985
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 235 – 1978
• Johnson/Evinrude 6 Cyl 3.500 Small Bore Cross Flow 235 – 1979

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.

You May Also Need

Browse related parts for compatible models:

• Water Pump Impeller Johnson / Evinrude 85 - 235 Hp Cross Flow 73-78 OEM# 0385528 – 700-285
• Water Pump Kit Complete Johnson / Evinrude 85 - 300 Hp OEM# 0390768 – 750-255
• Thermostat Johnson / Evinrude / Mercury / Mariner 4.5 - 300 Hp Stainless Steel OEM# 0377148 – 775-110
• Thermostat Johnson / Evinrude 4.5 - 300 Hp OEM# 0377148 – 775-125

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