2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 100Get this manual
ELECTRICAL WATER TEMPERATURE SWITCH TEST
Complete the circuit with heavy jumper between the battery negative (-) terminal and the starter frameswitch lead and one lead to the metal portion of the switch Place the switch and an accurate industrial thermometer in warm automotive crankcase oilSlowly increase the oil temperature using an external heat source
Monitor the starter RPM and current drawRefer to the following chart for the correct specifications
No Load Current Draw Specifications
Model All Voltage 12t012.4 Amps (Maximum) 32 RPM 5700 to 8000
The temperature switch must function as follows: Switch Closed 240 6F (116 4G)
Wire Color TanBlue
Switch Open 207 15F (97 9G)