ILENGINE
Lawn Royalty
The Kohler standard is less than 1 Volt And anything that drops the voltage at the starter solenoid below 9 volts won't engage the solenoid.Take note in post #9, You are not checking the voltage to ground with your voltmeter.
You ae checking the voltage drop ACROSS the trigger voltage circuit., which should normally be a low reading of 2 volts or less across the whole circuit.
and this reading is taken under load, ie: while the ignition switch is held in the start position.