The Sierra 18-3553 Thermostat replaces Mercury 135-200HP, Mercury 75692 for Mercury Outboard applications. It regulates cooling-water flow as the engine warms and cools, helping maintain the intended operating temperature.
143 Degree F thermostat for Mercury EFI and carb 135-200HP 2 Stroke V6 outboardsÂ
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-3553?
Sierra 18-3553 is an aftermarket thermostat for Mercury Outboard applications.
Which part numbers cross-reference Sierra 18-3553?
This listing cross-references Mercury 75692, Mallory 9-43019, Mercury 13010 and Mercury 62981. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-3553 fits my Mercury Outboard application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
