Running at the optimum temperature maximizes performance. A failed or failing thermostat can cause an engine to run at outside of its optimum temperature and adversely affect performance and efficiency. Getting back to the right temperature can be as simple as replacing the thermostat. Sierra makes sourcing parts for the job easy by packaging the thermostat and gaskets for an easy out the box installation. Each Sierra part is engineered to meet or exceed Mercury specifications to assure boaters and technicians it will fit right the first time and restore function to OEM specifications. Key Features Thermostat meets or exceeds manufacturer specifications Temperature rating of 143F (63C) Complete kit includes thermostat and gaskets to eliminate time spent sourcing individual parts Thermostat replaces Mercury Marine 833072003, 833072 Compatibility Chart HorsepowerModelYears manufacturedSerial Number Range200200 DFI1997-19970G386496 THRU 0G589999225225 (3.0L EFI)1995-19950G129222 THRU 0G760299225225 (3.0L EFI)1996-19960G129222 THRU 0G760299225225 (3.0L EFI)1997-19970G129222 THRU 0G760299225225 (3.0L EFI)1998-19980G129222 THRU 0G760299225225 (3.0L EFI)1998-19980G760300 THRU 0T408999225225 (3.0L EFI)1999-19990G760300 THRU 0T408999225225 (3.0L EFI)2000-20000G760300 THRU 0T408999225225 (3.0L EFI)2001-20010G760300 THRU 0T408999250250 EFI1995-19950G129222 THRU 0G760299The Sierra Engine Parts SelectorIn addition to thermostat kits, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see ourEngine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.