Glad to here that your back in business. If you use stabil make sure that you run the engine long enough (3-5 minutes) so that it makes it way into the carborator. I prefer to let the engine run until the tank is empty before storing away for the season.
I didn't realize that Cub Cadet has/had Onan engines. I acquired my neighbors 1975 Sears lawn tractor, back when they used real metal, (48"deck & 46" plow) a month ago. It has a 16HP twin cylinder Onan engine which runs like new.
I'm also supprised that you don't have a diesel lawn tractor. He he.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles