need help getting it running. hasn't ran in three years or so. I need to know what i need to change and fix to get it running so i can mow some big lawns with it. it also came with another deck and a snowblower. machine has 2600 hours and was given to me. also can the hydro's be locked out so i can push the mower on the driveway. my fourwheeler barely pulls this huge beast!