I have a 2004 Hustler super mini 52 inch deck, 24 horse Honda. There is no spark. Last year (right at the end of the warranty) it began intermitently, now it is just dead. Does not appear to be any saftey device cutting the spark. Any one else run into this trouble? I need it to pick up leaves with the bac-vac. Started at 70 hours, now at 90 hours.