Hey AVB thanks for the prompt reply.
On the engine plate it says it is a Type - 1384 E1 with a Code of 050823
Yes breather tube was the word i was looking for - these grommets are split and/or barely holding on.
I hope this helps - The tank is definitely metal but does not 'appear' overly rusty when I peer in or on the outside.
My understanding is i cant adjust the fuel mix on these through some reading but i am not entirely sure. I have also seen the carby diaphragm will often need replacing also.
I don't think the engine is in that bad a condition or old to have the real bad problems i have seen on youtube.
I can see one screw which appears to adjust carby fuel intake or similar but as i screw it out we seem to get quite rough - i cant screw it in anymore either.
RG