Talk Morgan Forums Thread Like Summary - Reaching out for some sucking advice :-)

I'm after some plus 8 owners experienced advice re Rover engine ignition vacuum advance.

Could somebody confirm or deny that if they took off the little vacuum pipe from the inlet manifold and sucked hard on it whether they can see the distributor plates in the distributor rotate?

I have a Triumph Stag which uses the same Rover distributor (I think its Lucas) and I'm getting mixed responses to this question. My car starts and ticks over lovely but is unhappy at higher revs. I suspect the vacuum advance diaphragm has gone hard after sitting idle for many years.
I cant move it by sucking on the little tube but it works fine when using a minivac brake bleeder pump, so am confused?

I feel sure somebody on here will know if a mere human (other than Bonnie Blue ) can move the advance mechanism just by sucking on the pipe

Thank you in advance lol

According to my notes the base plate should start moving around 5 inches Hg and reach the full movement at 15 to 17 inches Hg. May be a coding on the diaphragm to denote the start finish and advance

Again from my notes, the vacuum advance measured at the distributor is around 8 degrees. There's a guy at Rimmers who knowledgeable on distributors, but only those with points. He did write a book about refurbishing distributors, but since we moved house there is a whole lot of things I can't find and that book is currently gone awol