black cloud is too much fuel. with the very cold temps the choke is stuck closed or never opens at all. starving the engine for air. check the choke linkage for freedom ov movement and also check the air cleaner housing snorkle to see if the exhaust heat plumbing is functioning. also, make sure ur oil is of a lo viscosity. 5w30 or less.
also, try this place too
c my attachment too