Wheee- The rated HP-- Boy - I will bet my life on those numbers .
So far - I have not seen a advertised shaft torque reading on any hobby engine ---
One English model mag contributor used /uses torque readings - but in the US --the power outputs are so skewed by advertising policy - I would not touch any of em -
As for 6200 on a Zinger Pro -in Wyoming - --Terry, - I would say that that is pretty good and not out of the ordinary for a non tuned , muffled 86cc twin/single.
That particuar prop will go faster -by quite a bit on a piped 80 single - but some guys think pipes are " cheating"(?)
One question tho - why not disagree ?
This is a discussion forum - If the info does not appeal to you , why rant?
The worst info I ever got was from people who all agreed with me .