Rear sprocket damper question

[AZGeezer]

I had the rear wheel off the other day to change the tire and noticed that there was quite a bit of play between the rubber sprocket damper and the cogs in the rear wheel hub. Consequently the sprocket turns back and forth about 1/4" before it engages the wheel. I looked in the service manual to see how much play there should be, but couldn't find any specs. Does anyone know if there should be any play and if so how much? The bike rides fine and I don't notice any jerking or lashing in the driveline. Just thought I should check it out.