Thank you, Joe_Caroll and maxwestern for your replies and comments,
I have been told by my lawnmower service centre that if the petrol leak came from the carby, it would be a problem to service the carby as spare parts (eg. Rubber O ring or gaskets, metal needles, ect) could be a problem as spare parts for such an old Victa Mustang may not be available anymore!
I have purchased the red primer bulb that maxwestern suggested and will fit this to my carby and see if this will stop the fuel leaking. If this does not work, I will try and remove the carby cap and clean around the float area and replace the rubber O ring if I can get a new replacement.
Thanks again,
Lecky23
