1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Manual, P/N 507124, Page 140Get this manual

1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Manual, P/N 507124, Page 140

Engine Temperature Check The Markal Thermomelt Stik is heat-sensitive marker that melts on contact with surface of specific
temperature must be 70 100 (21 30 C)Pyrometer Procedure InAvoid accidental starting of engine while changing propellers;
twist and remove all spark plug leads1Install correct test propeller and place engine in test tank2Start the engine and run
it at 3000 RPM for at least minutes 3Reduce engine speed and run it at 900 RPM for minutesAt 900 RPM, digital pyrometer should
indicate 1400 150 (60 C) when held on cylinder head If engine temperature is not within this range, troubleshoot cooling
system to determine problem 4Increase engine speed to 5000 RPMAt 5000 RPM, the digital pyrometer must not indicate more than
1200 (50 C) If engine temperature exceeds 1200 (50 C), troubleshoot cooling system to determine problem INote If your test