Hi Grumpy, and thank you for the reply.
I put a new air filter in this morning and ran the engine for about half an hour and it is still running rich but certainly not as bad as it was so that's good.
With regard to the idle adjustment I was thinking that was controlled by parts 149 (1149 on the picture)and 689 which are intact and functioning OK.
Now I am a bit confused! The jet that I have circled in the pictures I thought was the main fuel mixture jet (Part 147 on the parts list)but you are saying it adjusts the idle mixture which is now beginning to make sense because it does idle fast, much faster than my Scotty.
Does that jet(147)have a spring and is it part 692?
Cheers
Alistair
