View single post by redracer
 Posted: 10-01-2019 11:10 pm
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Joined: 09-10-2012
Location: BROOKHAVEN, Georgia USA
Posts: 296
The "cylindrical device" on the rear carb is the vacuum actuator for the by-pass valves, one located on the right side of each carb.
This item is "negated/ blocked-off" by either removing it or putting a steel ball in the 90 degree hose coming off the back center of the intake manifold. When doing that, both the bypass valves will have a solid gasket put on to "block" any vacuum leak there.
Again, the "black hose" between the 2 carbs is the 3/16" FUEL(****NOT VACUUM HOSE***) line allowing fuel to go from the front carb choke to the rear carb.
Hope this helps, bruce