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? chinewalkerUS Member - 1 Year (includes $3 online payment fee)Replies: 459Topics: 15 April 24, 2018 at 10:26 am #74633 Sometimes, if I have a propshaft for a similar motor in the pile, I’ll set it up in a vice and mount the prop. If it’s spun, I can turn it by hand with much effort. Often, a badly spun prop will be apparent with a visual inspection.