Sierra Thermostat Johnson/Evinrude Outboard 18-3557 by Sierra International $26.90 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Sierra Thermostat Johnson/Evinrude Outboard #18-3557 Replaces OMC O.E. 0396987, 0382385 143 degrees