I have done so many...the time is determined by the height of the damage relative to the gear case. The closer to the gear case, the thicker the material used to fix. Thicker material means more shaping to finish, i.e.. sanding. The one thing I always do is cut a notch, or shark tooth the repair. It adds a 3rd dimension to the repair so that the weld is not in a straight line. Imagine an EKG or heart beat...
700 wouldn't get me to turn on a welder at this point, let alone deal with the work it takes to make sure you keep the gear case at a reasonable temp while getting a good weld, then shaping, spot welding (no filler), sanding to finish grade, and painting.
In my experience most Merc cases are very good castings-keep it clean and you won't have issues.
700 wouldn't get me to turn on a welder at this point, let alone deal with the work it takes to make sure you keep the gear case at a reasonable temp while getting a good weld, then shaping, spot welding (no filler), sanding to finish grade, and painting.
In my experience most Merc cases are very good castings-keep it clean and you won't have issues.