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?
April 24, 2018 at 1:35 pm
#74644
quote FrankR:
quote Chinewalker:
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.
"Much effort" are the key words here. The 35hp props are supposed to hold 165 ft lbs according to the chart. It’s dang near impossible to apply anywhere near that much torque without the special fixture made for the job.
But, a spun prop will often spin with much less. Other things to look for, a hub that appears off center of the prop casting, evidence of rubbing on the prop casting, rubber bits snaking out of the gap between the hub and casting, etc.