Saurashtra, who were staring at defeat with a score of 78 for six, were bundled out for 92 within a few minutes of start of play on the last day adding only 14 runs to their overnight total while losing the rest four wickets.
Orissa required only 6.3 overs to bowl out the visitors this morning.
The visitors had crawled to 85 when skipper Jaydev Shah, who was holding the innings together, was run out by Sanjay Satpathy for 39. Shah, who stayed at the crease for 101 minutes, hit six fours.
Mohanty, who had taken three for 14 in the first innings, captured four more conceding only 10 runs to return fine match figures of seven for 24.
Off-spinner Sanjay Satpathy had struck telling blows yesterday taking advantage of the turning track claiming four wickets for only 28 runs.
Orissa gained five points from the match including a bonus point.
Orissa had taken two points from their first match against Goa recently.