While launching my boat the other day my winch broke. The boat slid back on the trailer and bumped the outdrive on the concrete ramp before sliding into the water. It put a flat spot on the drive right below the pointed (bullet shaped) part of the drive. There are no cracks or leaks. The drive seems to work fine. My question is, will this damage affect the drive while cutting through the water? Should the housing be welded over this spot to build it back up? Thanks for your input!