I just brought this mower home, in pieces, as a favor for a friend. It has been sitting for 15+ years. The engine will arrive later; it has no compression. I would like to identify this thing for certain so I can get some manuals for it. Apparently Gravely used the name "Promaster" for many mowers, so I'm calling it that because it looks like the Promaster 400 pictured on line.. This one has a 3 cylinder Yanmar engine, a 72" 3-blade mower out front, a hydrostatic transmission, and rear wheel hydraulic steering. Any information, identification, comments, or ideas are most appreciated.