Small Engines (Lawn Mowers, etc.): dynamark snowthrower, snow thrower, model numbers

Question
Have a 7hp-3 stage snow-thrower,model#53620101 with automotive differential.Pushed great last year now doesn't have the drive force it used to.Could problem be 1)drive disk 2)differential and where might I find a manual.

Answer
Hello Todd:

>>Can you Check the Model Numbers Again for me, Please. I cannot Locate this Model in my Manuals or Online.
>>Send me the Serial Numbers or the Year of Manufacture also if Possible.
>>Thanks

Respectfully

John

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Respectfully

John