2003-2005 Kawasaki JetSki Ultra-150 Factory Service Manual, Page 248Get this manual
ELECTRICAL SYSTEM 14-47 Sensors
Speed Sensor Inspection
Disconnect the speed sensor connectors [A] (see Wiring Diagram)
Connect the battery and tester leads to the sensor as shown
Rotate the waterwheel by handaslowlysensor Measure the output voltage of speed
GR (+), BKW () 10 twice rotation (Rotate it slowly