I `m guessing you re fueled at some stage, thus perhaps fuel quality..? Failing that, perhaps fuel pressure. Lorne on GoMoG has a lot of experience in fueling that engine, thus I suspect there will be plenty of info on his site.
As best I can remember Lorne upgraded the whole fuel system on his Morgan in time. I think he fitted an adjustable fuel regulator which operated on the return line to the tank. (?) Lorne also fitted a pressure gauge which I think he left permanently connected in circuit.
Hopefully others more knowledgeable on the flapper system will jump in to help out
4Seat +8, I think Peter had one specially built for Mrs Morgan as a one off..?
Good luck Philip..
