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R3 represents the winding resistance of the starter solenoid. (i guessed about 2 amps)
In your picture V1 will read 0.06 volts and V2 will read 12 volts.
On the other hand if you replaced the 1000 ohms with the impedance of the battery and the contact resistance of the switch (<< 1000 ohms) the voltage across the solenoid (R3) would be about 12 volts.
The .op is just a spice command to find the DC operating point. It is simpler to do that than use a calculator.
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Rick
88 Cab
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