Jeff F. I have o'hauled my 126 and 147. No special tools,just ring compressor,torque wrenches,flywheel puller,etc.The "K" series Kohler engine manual is still available and is well written and easy to read. The IH manual for that series of Cub Cadets is GSS-1404 and covers the entire tractor (I have a reprint) Downloads are available,but a hard copy is nice for a quick lookup out in the shop. The cylinder tends to wear worse at the bottom,take out the piston to be sure. Both of mine needed to be rebored and the crank turned for the rod. The mains are ball bearings and looked very good in mine. The balance gears are suspect and sometimes fail, destroying the crankcase. Some people leave them out when they do an o'haul(Idid). If you still have the original fabric and rubber coated style wiring harness,this is a good time to replace it,too.