91 subaru legacy was running ok now it won't start. the lights come on ok but when i turn the ignition it goes rrrrr arrrrrr and i can smell gas but it won't turn over.

 

What's a timing belt and could that be it?

A timing belt is used to drive the cam shaft(s), usually there is two of them, from the crank shaft. They are located in the front of the engine. If one breaks it will disable that side of the engine. If the distributor is run from that side it will mean no spark to any of the plugs also.

 

It sounds like you may not be getting spark so I would check that first. It could also be due to no voltage getting to the ignition so check that if you don't see any spark.