1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 147Get this manual

1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 147

Engine Temperature Check The Markal Thermomelt Stik is heat-sensitive marker that melts on contact with surface of specific
'" Avoid accidental starting of engine while changing propellers; twist and remove all spark plug leads 1Install correct
test propeller and place engine in test tank2Start the engine and run it at 3000 RPM for at least minutes[":;1 3Reduce engine
speed and run it at 900 RPM for minutesAt RPM, digital pyrometer should indicate 1400 150 (60 e) when held on cylinder head
If engine temperature is not within this range, troubleshoot cooling system to determine problem1al4Increase engine speed
to 5000 RPMAt 5000 RPM, the digital pyrometer must not indicate more than 1200 (50 e) If engine temperature exceeds 120 (50
e), troubleshoot cooling system to determine problem If your test readings are low or inconsistent, coat the probe location