1989 Johnson Evinrude "CE" 9.9 thru 30 Service Repair Manual, P/N 507754, Page 133Get this manual
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Therm omelt Stik Procedure
Gl 3 Reduce engine speed to 900 RPM and mark the cylinder
F (520 C) and 1630 (730 C) Thermomelt Stik
4 At 900 RPM the 1250 (52 C) mark should remain liquid