Small Engines (Lawn Mowers, etc.): 8.5hp troybilt snowblower, troybilt snowblower, snow blower

Question
My 8.5 hp troybilt snow blower will not roll.  The wheels have locked.  The engine starts but even if the drive is engaged it will not move it remains locked.  The unit was working fine in an snow two weeks earlier.  It is in it's third season with low hours.  I have tried to adjust the drive cable.  It does not seem to help.  Any suggestions?

Answer
 Hello Scott:

 Send me the Model Numbers Off the Snow Blower, Please. With these I can Locate a Breakdown/IPL and Better Assist you. There are Several Different Drive Systems and the Model will Assit me in Properly Answering you Question and I can Use the Breakdown/IPL for a Reference when Explaining What May be the Cause of your Problem. You will be Able to View this Breakdown/IPL Online Also. Thanks.

 Respectfully
 
 John