If there is "no choke on it" - does that mean it was machined off and the top of the carb. is now flat?
If so, then
- you can't refit a choke plate and parts to it ...
The easiest thing to do would be to replace it with a new carb. having a choke and the features you need.
As far as identifing the carb. you have;
A.) Does it have a Secondary Metering Block? If so it is a 4150 type - if not it is a 4160 type.
B.) You can pull the carb and check the throttle bore size to see about what CFM it is and know what size you might need to replace it with.
As a general rule here are the throttle bore sizes for the three (3) most popular sizes:
CFM - Bore size
650 - 1 9/16” (1.5625/39.6875mm)
750 - 1 11/16” (1.6875/42.8625mm)
850 - 1 ¾” (1.750/44.449mm)
There are all kinds of exceptions to those bores = a given CFM, but it is a good starting indicator of CFM rate.
And your English seems just fine to me
Much better than my Nynorsk
Hope this helps