My Honda is roughly 10 yrs old, model HRB216TDA. The specs online say it's engine is a Honda OHV/OHC Premium Residential engine. It just recently started running only in full choke mode.
Used to be when I forgot to throttle back from full choke, it would sound funny and run slower but now on full choke, it sounds and acts normal. When I throttle it back to the normal setting, it dies immediately. Doesn't even sputter, just flat dies.
Does someone have any idea what's wrong? If it's a dirty carburetor, is there an additive I can run through it or does it call for a rebuild? I checked to see if the throttle cable might have slipped out of position but the way it's made, it's pretty well locked in place and can't move.