How did you isolate/close off the primer/purge bulb ?Could be a problem if not absolutely sealed.
When I ditched the bubble, I used a new carb
Before ever mounting it or putting any oil & fuel in it.
I sat down and cleaned the brass purge line fitting so as to not have any tarnish, skin oils or
manufacturing lubes coatings, etc on the tube.
I did the pre-clean so as not to have any contaminates left inside of the tube
or trapped in crevices made by crimping
because it's difficult to reliably clean them out after the crimp.
An ink eraser is mildly abrasive and handy for burnishing the metal after degreasing
and will improve the flow and adhesion of anything used to seal the the fitting.
Then I double checked that I had the correct fitting and made the crimp/pinch.
That done, I gave it a quick cleaning again and then brushed on some flux,
making sure to get it inside the cut end of the fitting and outside.
( make sure the flux is correct type for the type of solder you have )
Then I grabbed the big Weller soldering gun and put some BTU's into the fitting first
and then fed a bit of solder till I liked the flow and plugged look of the fitting.
A bit of fuel line with a plug in it, slipped over the fitting would do the job too.
I just wanted to not have to be concerned with the hose aging issues or slipping off, etc.
After removing the choke plate from the carb, I also soldered that hole in the choke plate
using the same fussy cleaning routine.
Note that if you have a plastic shaft, you absolutely have to remove the plate from it
to solder or you'll melt the shaft and ruin it.
Check post #9 for a couple pics of my efforts.
http://www.arboristsite.com/hand-held-equipment-tools/241144.htm#post4449561
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Of course by the time I peck all of that out, you'll likely have already gotten a better answer.
Took the bulb completely out (it was cracked anyway). Just have 2 lines directly to the carb....
