Blown head gasket or a broken ring?

[georgehosmer]

I have a Husqvarna 23Hp lawn mower. When its warming up. it starts easy but it blows smoke out the exhaust. Could it be a blown head gasket or ring?

 

[mechanic mark]

check oil level on dipstick first make sure it's on full mark, what color is smoke, blue, black or white?