I recently purchased this motor on a boat. I took it out for brief test drive and had no shifting issues, or other that I knew of. Took it to a local marina to have the motor checked out. They supposedly saw oil leaking out of the lower unit, pressure tested it and said seals were bad, and should replace oil pump. they tore it apart and say $750 for that work. also said there is some where on the forward gear teeth as I understood (has square teeth about 1/4" high). These teeth are slightly rounded on the edge, they have a radius on them from wear of about 1/16". They are saying they can't guarantee how long it will work. they say rebuilding will cost almost as much as a new unit around $2200. Is this little bit of wear an issue?