Turns out the solution was 'none of the above' but easy none-the-less! Since I am new to this tractor and it does not have a tach I simply did not have it reving high enough 
I found another post on this site that said the correct throttle setting for this tractor was "full open and then back a bit", works like a charm.
Thanks!
Charles
I found another post on this site that said the correct throttle setting for this tractor was "full open and then back a bit", works like a charm.Thanks!
Charles