G'day Norm and Ironbark

The full crank 160 cc motor is a straight 3/4 shaft, the image is here.
https://www.outdoorking-forum.com.au/forum/u...icta-full-crank-with-3-4-inch-shaft.html

I haven't taken one apart but looks like the end of the crank would have an internal thread or /and a
grub screw to hold the fan on.

Possibly the Powertorque is the same.

Cheers
Max.