Brian: Charlie is correct that most Cub Cadets have Kohler single cylinder 10, 12,14 & 16 hp engines and use the Autolite 216.
However, other Cub Cadets which have 6,7, or 8 hp single cylinder Kohlers use an Autolite 458. The 682 & 782 which have a Kohler twin cylinder KT series engine use the Autolite 826 and the 982 uses an Autolite 3926.
Like Charlie, I use Autolite plugs in all mine and never have plug issues.
Myron B
However, other Cub Cadets which have 6,7, or 8 hp single cylinder Kohlers use an Autolite 458. The 682 & 782 which have a Kohler twin cylinder KT series engine use the Autolite 826 and the 982 uses an Autolite 3926.
Like Charlie, I use Autolite plugs in all mine and never have plug issues.
Myron B