I think it has something to do with the clutch pedal switch or deck lift lever switch. I have replaced the battery and starter, spark plug looks good. It will start, usually, but never right away and generally only after I raise and lower the deck a few times and kind of pump the clutch. But this time it won't even click. I don't know how to check these switches but I do know where they are and have unplugged tem and blew out any debri with the air hose. I just don't know what do try next. Any ideas?