Carb slide or rotary?? Rotary Set HSN to bottom out then 2 1/2 turns CCW. Idle speed or airgap 1.5mm. Prime engine with fuel by disconnecting fuel line from muffler, and blow into it, watching the fuel line tank to carb fills up with fuel. It starts, turn your idle down maybe started in hi rpm. Let me know!! I'm not in australia. This is close to manufacture settings for start up with Rotary carb.
With Slide carb all the same except the airgap set at 1mm. HSN set at 3 turn from closing.
Give it throttle it stalls turn HSN 1/16 turn CW until it stay running.