I can easily turn the shaft by hand.
This came out of long term Onan Corp long term surplus storage. New old stock, just long term storage neglect.
Please study the pictures carefully. Pump was knocked around and improperly stored in a wooden crate with a bunch of other pumps all the while leaking out the factory test liquid still inside all the pumps. Moisture caused some of the steel parts to rust and get pitted. I have buffed it out the best I can. The pump was never submerged or anything like You see a couple dings in the body but everything works and the defects all seem to be mostly cosmetic.
I have been selling these types of pumps for over 15 years and have had great reviews.