Quicksilver 991551 Marine Boat Replacement Thermostat FHBOLT3 Fits 2004 and newer Mercury/MerCruiser

Fits 2004 and newer Mercury/MerCruiser sterndrive and inboard engines with Gen III (3) fuel cooler system

-Zipper/Toggle Pull

MRV wiper motors

Vertically or Overhead

gasket and cap

Quicksilver 991551 Marine Boat Replacement Thermostat FHBOLT3 Fits 2004 and newer Mercury/MerCruiserThermostat 991551 is for 1998 and newer MerCruiser marinized V6 and V8 engines made by General Motors using closed cooling systems and requiring the use of the 160F thermostat. Product Details Manufacturer part number: 991551 160F thermostat Easy to replace with common tools See your owner's manual for removal of non functioning thermostat and replacement of new thermostat Thermostat 160 F is compatible with 1998 and newer MerCruiser V6 and V8 engines.