1959 Johnson 35 Unknown Wire(?) ID

[Super Hippocampus]

Hello,
Anyone have an idea of what these two wires (circled) are for? At the bottom of the bottom cylinder, on the port side of the outboard (1959 Johnson 35 RDS-21). They’ve been floating out there since I got the outboard, can’t seem to find a good picture or diagram that show them. May be a skinny hose too, won’t be able to check the motor for another week.
Thanks!

 

[timguy]

Typically the tan wire goes to a warning buzzer in your remote control to alert you of an overheat. Other wire comes out of the sensor and goes to ground. When the ignition is on, as if in the run position, this energizes one side of the buzzer with 12 volts and then when the overheat sensor reaches the warning point it grounds out the brown wire allowing the buzzer to alarm the operator. So to test operation turn your key to the on position and then ground out the brown wire near the sensor there and your buzzer should sound.
Typically the activation temperature for the little bimetal disc to allow the switch to ground is 200 to 215 degrees Fahrenheit. This switch is mounted in one of the warmest points of the motor, the inner combustion chamber wall, and as you know the water temperature generally stays in the 145° range.
This is beautifully simple and headache proof.