Hi RR,
You might or might not have a tufnel spacer between the carb and cylinder head? If the rubber is prone to slipping off then I'd not use any lubricating liquid as such.
Thanks LJ & terryk;
Felt better after the beer for sure! I don't have any spacers apart from the usual drip tray and two thin gaskets and haven't used any lube. But have I got the correct tube? - who knows; I wasn't aware there were 3 types. I ordered it for an A7 plunger so maybe there's my mistake. Will do some searching to see if any differents types are made. Also will look out a j/clip to secure one end at least if I can't get the corect part. One day........
Thanks guys,
RR