I purchased a new lower unit from Tohatsu a few months back and jut got around to trying to install it today. I ordered it by model (MFS15C) and serial number and they sent me what I believed to be the correct part..HOWEVER...when I attempted to change the lower unit the original shift rod is 2 pieces held together with a brass coupler and 2 pins. The one that was sent to me has a longer shift rod and is threaded. Obviously I cannot change the lower unit. Is there a piece that I am missing or did they send me the wrong unit? Everything else appears to be correct. Any help would be appreciated.