The valve that opens or closes based on the temperature in the cooling system of an outboard is a thermostat. When the thermostat is set closed, it prevents cooling water from flowing through the...
The Thermostat Kit 160 Degree fits OMC pre-Cobra 90, 120, 140, 225, and 250 marine stern drive engines from 1970 to 1985. It is design to resist the huge variations of coolant pressures that occur at...