The holes go toward the intake. Unless modified they should not be able to be put in wrong. I think, been a while.
The carb is also very susceptible to poor mixture settings. The electric solenoid on the bottom is the mixture adjustment device. it raises or lowers the main jet.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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