New seals installed and the first one (left) light off with no issues at all. the second one (right) struggled to light, I thought maybe down to using bioethanol instead of meths,. However it did light but struggled, burns bright when pumping but soon dies out, I'm thinking the vaporiser is partially blocked. I am delighted with the outcome though, these haven't been fired for years, they are dated Jan and March 1962. I don't think they have been messed with but which pump clamp is correct as one is brass the other is not.