We have a Tecumseh OH195EA engine on a Cyclone Rake unit. The engine ran fine last week doing leaves, but today it would only run at 1/2 choke position. I didn't have a new air filter with me so I had to run it that way today. Just need some info on what to look for, such as air filter, possibly a fuel restriction or blockage in the carb ? When it is at the full choke position it will die out and also at the full choke off position. There is also a temperature baffle in the air filter compartment but it didn't make any difference with it installed or not. The engine probably only has about 50-60 hours on it. Thanks.