Re: Prop question: how can you tell pitch? Or if the hub is spun? Home › Forum › Ask A Member › Prop question: how can you tell pitch? Or if the hub is spun? › Re: Prop question: how can you tell pitch? Or if the hub is spun? 49morphewUS Member - 1 Year (includes $3 online payment fee)Replies: 84Topics: 12 April 24, 2018 at 2:19 am #74620 You’ll know a spun hub. Motor will over rev as soon as slip begins. A spun hub will only push you along at high idle at best …..for a little while.