Great dane scamper

I have the scamper 17 hsp kaw engine hydro. It's the clip spring retainer. I think. My spring is hooked to eye bolt coming out the back of mower. Trying to send a picture.

The model number is tchr17wo10104. I think it is around 2002 or 2003 year. Pull start. I've looked at other ones and none have tension screw coming out of the back. Thanks. I see the diagrams on manuelslib but can't figure it out. Thanks.

Your last post doesn't show...
 
That model # isn't coming up anywhere..
 
In any event, nothing should be touching belts or pulleys.  
As for the tension spring, it's likely very heavy duty (correct me if I'm wrong).
With that said, you'll only be able to stretch it maybe an inch (roughly).
So with the spring attached to the "moving mechanism/arm", put it in the area 
of where it would be pulling (and not striking anything).  There has to be 
a hole, hook, etc for it to attach to...   
 
The hole it's currently thru, does the hole
appear to be factory drilled or evidence of someone making a random hole?

Some of them I'm seeing for sale have no bolt out the back. Some do. Makes no since.

They may have different set ups.
 
In any event look for where the spring may go. It'll be in that general area.
 
Is the way it's set up now rubbing on anything?
 
As for belts constantly breaking, loosen the tension on the belt(s).
Check all idlers, spindles, etc for any roughness, tightness, bent, etc.
Something is not correct causing the breaking of belts.
 
.