<VV> RE: Vacuum adv. question

[JVHRoberts@aol.com]

40 inches Hg vacuum? How did they manage to do better than an absolute 
vacuum? <G>


In a message dated 4/15/2004 10:34:06 PM Eastern Standard Time, 
Kevmcclain@aol.com writes:
Hey everyone,
    I find myself in uncharted territory at the moment. I just bought a #177 
vacuum advance can for a 61 clip type distributor from Clark's (P.N.- 
CU7831-177) this is a used part. I tested the part with a Mity-Vac to see how 
many 
inches of mercury it takes to actuate. Larry Forman (it's his Mity-Vac) tells 
me 
it should begin to pull in around 9 in.Hg. And showed me how to modify it if 
it began to pull in below that. This Vac. Adv. begins pulling in at approx. 
20-22 in. Hg. and is fully in at approx. 40 in.Hg. this is for a 1961 80HP. 
If 
anyone can tell me if this is correct for the unit, and if not, what is 
proper, 
that would be awesome. thank you in advance (no pun intended) for your help.  
-Kevin McClain