Quicksilver 8M6010305 143 Thermostat - Fits OMC/Johnson/Evinrude 90-170hp OutboardsQuicksilver thermostat 8M6010305 is for use on select 90-170hp Evinrude, Johnson, OMC V4 and V6, 2-cycle outboards. This 143F Quicksilver thermostat is designed to meet all OEM specifications. See your owner's or service manual for specific application and installation information. Hardware, gaskets or seals for installation sold separately. This Quicksilver thermostat replaces the following OEM part number: 435491. Also can be found in the aftermarket as 18-3544.Engine Part Application:For use on select 90 hp through 170 hp Evinrude, Johnson, OMC V-4 and V-6, 2-cycle outboards.