Aren't they supposed to be this way? They need gas to run? Kidding......
Choke working? Carb clean or replace? This most likely is your issue.
Valve clearance adjustment proper?
Air filters clean?
Use fuel stabilizer year round?
Take off the blower/starter engine cover and clean off all the oil, dirt, grass and bugs on the engine block cooling fins. Look all around the block for fin blockage.
Use real 100% gas if you can get it year round.
Do you have good compression?
Go back to the basics - air, fuel, spark and compression.