Winter is here in Helena Mt. and I figure it's time to get on with the winter project. Last winter I picked up another 646 up the road in Great Falls Mt. After rebuilding the rear end and the front end I figure it's time to remedy the smoking Onan under the hood. My last 646 repower was done using an 18 hp Kohler V-twin so I have chosen to use the same engine again. Everything on this tractor works well so the swap out should be easier to do than the last one. Unfortunately this tractor is not complete and some 3 point fabrication as well as new hoses will be needed. I will attempt to do a better job of documenting this process and posting the pics.