Briggs 550EX

Hello, I am new to the forum and I have a question about a Briggs and Stratton 550EX motor that is on my Husqvarna push mower. I pulled the flywheel off and the crankshaft has play in it. With the flywheel on it, I can move the flywheel from side to side and when you spin it, it just wobbles around. I thought it might be the key or something but when I pulled the flywheel off, it just has a lot of play in it. It looks like where the crankshaft comes through the top of the block should have a bearing or something but I know it doesn't. Could somebody please tell me what this could be.
Thanks

Briggs 550EX