Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru or visible damage (cracked/missing vanes)

or visible damage (cracked/missing vanes)

Because specific model years vary

Reattach Lower Unit: Guide the driveshaft back into the engine and secure the lower unit with its mounting bolts

Carefully remove the bolts securing the thermostat housing cover

Super 15 25 2-Stroke 1988-1998 99157T2 USA ser# 0B238464 & Up

Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru or visible damage (cracked/missing vanes)Thermostat 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