I think,Don, this sounds like the starter clutch isn't engaging. The rear wheel on a Sebring WILL spin,even though the engine isn't engaged thru the starter clutch.
Are you pulling the starter clutch lever on the left handle? It is supposed to be hooked up to a cable atop the tranny on the left side. You'll see an actuator arm atop the tranny. It's a little tricky to hook up correctly, since the lever will be pulled by the cable housing and the cable wire is stationary at a fixture on the casing. Don't keep this engaged after starting............you'll burn the starter clutch plate up. Only engage pull the handlebar lever to crank the engine over. Make sure you don't have it so tightly adjusted that it DOESN'T disengage completely. You only want the starter clutch to engage when the lever at the handlebars is almost completely collapsed. don-ohio (:^)