john deere gx85 flywheel issue

[Tanker1895]

I have a GX85, ran fine all year, went to mow yesterday, started up. starting mowing, engine started to struggle, then ran fine, then it sounded like something snapped and engine stopped, white smoke came out. Tried to restart engine, the flywheel turns when I turn the key but the engine wont engage. The flywheel turns way too easy by hand. Not sure what broke.
Any help is appreciated.

 

[mechanic mark]

check oil level on dipstick & what color is oil?

does oil on dipstick smell like gas? remove spark plugs & check engine compression.

http://manuals.deere.com/cceomview/OMM133763_F7/Output/Index.html?tM=

 

[Tanker1895]

Oil level is good, color is black