1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 199Get this manual
Thermomelt Stik Procedure
i lers to avoid accidental starting of engine
'" Twist and remove spark plug leads before changing propel-
1Install correct test propeller and place engine in test tank2Start engine and run 3000 RPM for at least five minutesf41 3Reduce engine and run engine at 900 RPM for five minutesMark both thermostat pockets with 1250 (52 C) and 1630 (73 C) Thermomelt Stik4At 900 RPM, the 1250 (52 C) marks should remain liquid and glossyThe 1630 (730 C) marks should remain dull and chalky If the 1250 (52 C) marks do not become liquid and glossy, troubleshoot the cooling system for causes of overcooling If the 1630 (73 C) marks become liquid and glossy, troubleshoot the cooling system for causes of overheatingf41 5When the engine speed is increased to 5000 RPM, both 1250 (73 C) marks should remain dull and chalky If the marks become liquid and glossy, troubleshoot the cooling system for causes of overheating