1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 125Get this manual
Retaining Ring Pliers
Thermomelt Stik Procedure
&Twist and remove spark plug leads before changing propellers to avoid accidental starting of engine
1Install correct test propeller and place engine in test tank2Start engine and run at 3000 RPM for at least five minutes
3Reduce engine speed and run engine at 900 RPM for five minutesMark the cylinder head with 1250 (52 C) and 1630 (73 C) Thermomelt Stik