Thanks this was helpful to get me started finding info... I now have the owner manual for the tractor (no service manual yet) also a owner manual and service manual for the kohler motor but have found nothing yet for the 48" deck. I think I may need new valve seals for the motor but it looks like there are many variations of this motor and parts numbers are different for some parts like valve seals.... the sticker that has the motor info has fallen off the motor so I'm not sure how to determine which one I have.
I still can't tell even what year my tactor is but here is a pic of the hood graphics.. anyone know what year they used this style graphics??