2009 Honda HRR2165VXA I have been using this mower for mowing 15 or so lawns once a week for the last year. This year I've started having problems when the mower is idling. The throttle cable has been stretched a little bit because I fold the handle down to fit in my truck. I've adjusted the throttle cable. The mower works pretty good at WOT when the blade is engaged. It surges and hunts for good speed when at idle. I've cleaned the carb out twice and adjusted the cable a few times. The fuel is new and the oil has been changed. I've also taken off the air filter entirely and it still has an issue. Any suggestions would be great.