The accelerator pump plays no part in a constant load condition. You have a restriction in the main metering circuit most likely. Either that or too large of an air bleed.

The accelerator pump problem is probably a stuck check valve or bad plunger skirt. Float level is always critical in a carb and blowing through the fuel inlet with compressed air doesn't sound like a good idea to me.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician