G'day everyone,
Thanks Maxwestern for all the help with this lawnmower it's great!

I have found another original style complete carby with the idle screw to put back on this mower.
It's cool with the blue and white colours on this mower from 1978, it reminds me of the blue and white Ford Falcon XC Cobra Hardtops from 1978.
Maybe when I get it going I could try to upload a video of it onto youtube and post a link here.
Thanks everyone for all the help it's awesome!
