My 2002 toro mower with kohler ch22s is missing., only running on 1 cylinder. Replaced plugs, no diff. Took compressin test, both cylinders 150-155. when engine gets hot, will not restart, have to wait for it to cool down.Drained gas tank, blew it out, new gas and filter. checked spark while trying to restart, gett ing spark. After restart wont take a load on engine, starts running on one cylinder than stalls out. Could ign. mod. be breaking down after engie gets hot? Welcome any and all input. Thanks Geppsr.