1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 127Get this manual
Thermomelt Stik Procedure
m rn 1ReduceC)speedato163 RPM and mark the cylinder 900 head with 125 (52 and (73 C) Thermomelt Stik0 0
2At 900 RPM, the 1250 (52 C) mark should remain liquid and glossyThe 1630 (730 C) mark should remain dull and chalky If the 1250 (52 C) mark does not remain liquid and glossy, troubleshoot the cooling system for causes of overcooling If the 1630 (73 C) mark becomes liquid and glossy, troubleshoot cooling system for causes of overheating
3When the engine speed is increased to 5000 RPM, the 1630 (73 C) mark should remain dull and chalky If the mark becomes liquid and glossy, troubleshoot the cooling system for causes of overheating
Servicing Camshaft SealAll Models
The presence of oil under the cam pulley could indicate leaking camshaft sealThe seal can be replaced without disassembly of cylinder head Remove the belt, cam pulley, and key as described in this section Use OMC Seal Remover Kit, PI 391060, and OMC Pressing Screw, PIN 342227, to remove the seal