hello

i have a new engine dz160, i buy it from a friend ( the engine never work )
i have no experience with engin like this.
can you explain me please how i do a good break-in
can you give some tips like:
1. how much i need to open the speed needle ? ( people caution me that if the engine run to rich it able to suddenly stop and broken! )
2. how much time need to break-in ?
3. if i do the break-in on wood plate i need to use with shock absorbing soft mount ?

thanks
kobi - israel