Case 2010 420CT starting issues

[Khahn11]

Hey guys, got a 420CT when I go to start the sucker (on block heater or not) it cranks and cranks and cranks, and finally it turns. After running it will run fine, shut it down and it will start back up no problem. But once it sits for 3 or 4 hours its work on the starter. Any ideas? Thanks everyone

 

[Tazza]

So, the issue is the starter not spinning the motor? or is it cranking but not catching?
If it's not catching, does it blow white smoke before it fires up? if so, i think your issue is compression, not enough to start it when cold, when it's warm, its far easier due to the motor being warm still, heating the air just enough for ignition.