Fixing a Qualcast Turbo Trak 35?

Hi....I recently started mowing the lawn and the mower stopped with no warning,their was no burning smell or strange motor noise, i changed the fuse in the plug & still nothing.
I have taken apart the pull lever switch and all wiring is in good order,can anyone advise on what i can check next or if & how i can bypass the pull lever & go direct to the motor to check its not switch related.
Also any diadgram of parts list would be helpfull.