OK - I don't think I have the optional spark arrester:
[Linked Image]

The pilot screw doesn't appear to be adjustable. It has a different head to the throttle stop screw. The pilot screw has a groove suitable for a standard screw driver but the head has a bit coming off one side which would restrict its ability to turn. Due to the position it would be difficult to get a photo of it but I could try if that would help.

As far as posting the float bowl picture:
[Linked Image]
Is this what you're after or should I try again. Just let me know. I can take as many photos as is necessary.

Thanks again grumpy