?
"Oren" wrote
From the Tecumseh manual, page 13 http://www.cpdonline.com/692509.pdf
A main or idle adjustment needle may be replaced by an
internally fixed jet on some models.


No. Never saw that before. Learned something today...

Maybe the OP will tell us if he has a Tecumseh carb on his B&S engine.
It would be interesting to know exactly what he has.

In any account he should not need to run his engine with the choke on.

Many engines have that feature today to avoid the environmental police.
Yes, he should not have to put the choke on, but it may just be a linkage
adjustment to get the choke truly off. Can't tell from here.