Broken down college kid

It won't crank if the interlock isn't working.

You need to get yourself a test lamp and multimeter.

Have you checked for spark, that is, remove the coil wire, hold it close to the block, and have someone twist the key?

You sure it's getting fuel? Should be able to remove the air filter, look down the carb throat, and with the choke open, work the throttle a couple of times. You should see a "shot" of fuel when you work the throttle.