I have a craftsman snowblower model 194923121b223 or c950-52119-2 it is backfiring when running and hard to start I need to leave the choke on to run what's the problem thanks chris

The carborator need's to be cleand and oil and oilfilter need's to be changed

U will need help if u don't have the know-how + a sett of new gasket parts fore the carborator
U might also need to chek the fule line fore rust and dirt oh and chek the fule tank fore inncoming water leakege