A friend, (John Southall for those that know him) has hauled his old Ruston out of the shed after sitting there for 10 years with the idea of getting it running and taking it to he odd Rally. Problem is, when he laid it up it had a full tank of fuel (what is he?) and, as you can imagine it is now thick black tar, so thick that it has clogged the tank, drain c*ck tap and pipe with this seemingly unmovable almost solid muck.
Logic says use a solvent of some sort and commercial cellulose thinners spring to mind but had anyone had the problem before? how did you overcome it?
I would appreciate your thoughts
Thanks in advance.