. When you buy a secondhand boat it is like buying a used car, you ether have to check it out yourself or have someone you trust check it out. I wonder how long the boat had been sitting around not being run? Does the shaft turn freely? I let my son try out one of my old models once without checking it out first, the oil had gelled around the shaft in the tube. It started to run then slowed down and blew the fuse.
Regards,
Gerald.