The long black tube was handing down under the battery compartment area where does it go. what does it hook to.

 

that could be the breather tube for the valve area

 

I got some pic here of he manual, what is the good tube according to you?(there are 3 tube)

 

 

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Tje really blactubwe shown in my pic. It was housed on the "railing" undeer mower aand went to back of mower. Iys a long tube its hanging down loose and i dont know where it attaches to. I know this. The mower I assume gets hot and will shut off after a while.