Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru removing old gasket material and

removing old gasket material and debris

Because specific model years vary

ensuring a precise fit and restoring proper belt tension to prevent slippage and squealing

or visible damage (cracked/missing vanes)

Carefully remove the bolts securing the thermostat housing cover

Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru removing old gasket material andThermostat Kit 120 Fits Mercury Mariner 6 25 HP 2 Stroke (Replaces 14586A3, 75692A9) This thermostat kit is designed for Mercury and Mariner 2 stroke outboard engines ranging from 6 HP to 25 HP, typically manufactured between 1986 and 1998+. It provides a reliable, direct fit replacement for maintaining optimal engine operating temperature. This kit replaces multiple OEM and aftermarket part numbers, including Mercury 14586A3, 75692A9, 75692A10, and