Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 103Get this manual
HONDA BF80AmaSA
bINSPECTION
THERMO SWITCH
1) Suspend the thermo switch in container of coolant or oilBe sure the switch does not touch the container2Heat the liquid and note its temperature when the thermo switch closes and there is continuity between the thermo switch lead and body[ 1I THERMOMETER #
Don't allow the thermometer touch the container
THERMO SWIITCH
Continuity (ON) No continuity (OFF)
100C 2OC (212" 36OF)
-7OC (2745OF) below the temperature when continuity exists