I'm sorry.. you
need to post pictures and measurements.
everything else is not helpful.
The engine is a Honda GX200 clone, but that has absolutely nothing to do with the belt you need.
The belt is part of the transmission,
either a clutch or a torque converter or something else we haven't thought of yet.
such torque converter or clutch can be mounted to any other engine of the same size..
So the engine is not a good call on figuring what belt you need.
here's the HF greyhound manual for your engine.. you can clearly see: no belt
http://images.harborfreight.com/manuals/66000-66999/66015.pdf
Even if you KNOW that you have a Torque converter we need to know the make and model (they use different type of belts)
And the center to center distance of the two pulleys (driver and driven)
since every type of belt comes in several lengths
So again:
post pictures and the most accurate measurements you're capable of (every 1/16th counts)
There's nothing wrong in not knowing what type you have,
we are here to provide all the necessary information and help we can.
But we cannot just point you to
any belt and
hope the best;
those belts are expensive and if it's the wrong one, your son is blaming you, and you're going to blame us
So we need to be sure.
'sid