1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 102Get this manual
Temperature Switch Test Purpose heat sensitive switch is installed in the cylinder head to monitor engine temperatureThe switch is connected in series with the warning hornIf the switch senses temperature in excess of predetermined limit, contacts close and cause the warning horn to sound continuous tone when the key switch is in the ON position
INote Each
ti me the key switch is tu rned from OFF to ON, the horn will beep once as self-testIf not, refer to Warning Horn, Section 1
rn switch from the cylinderconnector and remove the tempera1Disconnect the bullet ture head2Using continuity light or ohmmeter, make positive connections to the switchone lead to the switch lead and one lead to the metal portion of the switch