I'm just wondering if the pulley has been put on upside down, I assume it could be done, this would mean the cutter pulley would be driving the gearbox.
G'day
NormMaybe ... the schematic list seems to say that is possible.
['5' is the engine pulley]
My best guess, though, is that an 11hp unit complete with its pulley
were swapped with the original unit.
An 11hp unit is not suited to the colts, and I suspect the little gearbox
unit will fail quickly.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/ubbthreads.php/ubb/download/Number/11133/filename/colt_73_trans.jpg)