I got a craftsman riding mower made by MTD, model (247.288841). It is supposed to have a 19.5 B&S engine in it but instead it has a 17.5 B&S engine in it. Model (313707 0126 E1). I have found several (rigged) items on this mower and have been able to correct them. While checking everything out I found that the engine drive pulley is not the correct one for this motor. I noticed the pulley did not go all the way up the shaft as the drive belt was not inside the guides. The pulley looks like it was for the 19.5 B&S engine. I have researched this motor and cannot find any information on what this motor came off of so I cannot look up what the correct engine drive pulley is for this motor. This is the last thing that is keeping this mower from working properly. You can see underneath where the belt is rubbing on the brake bar. Any help with solving this problem would be greatly appreciated. Thanks.