I have an exmark with a kawasaki FB460v that died in me. Heres what I have done: 1. New spark plug 2. New fuel filter 3. Tore down and cleaned carb 4. Checked and blew out fuel lines 5. Checked ignitier and coil with multimeter....seem alright it does get spark but I am thinking it may be a weak ignitor coil that fails when it heats up....any ideas/suggestions???