Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru aligning the mounting holes and

aligning the mounting holes and securing with the original bolts

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

or visible damage (cracked/missing vanes)

Then cross-reference your existing part number (stamped on the old unit) with the part numbers listed in the cross-reference section

Thermostat Kit 120° – Fits Mercury/Mariner 6-25 HP 2-Stroke (Replaces 14586A3, 75692A9) family-yamaha-40esru aligning the mounting holes 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