I have a Craftsman model 917.252560 riding mower and would like to get a pdf manual (free preferrably). I had one and don't seem to be able to locate the site where I found it. Also, I replaced the mower deck belt with the recommended belt ( 1/2" x 95") and it is tight, so much it's dragging the starter and I can't start the mower. Is there an adjustment on the mower to give it a little slack until the belt wears in alittle? Thanks