Just installed it. Run great. But I'm not sure how to set the throttle linkage. The way it is now it idles down great, then mid travel the rpm pick up, when i move to full/ original choke it want to stall. It came with a small black plug, that was into the throttle linkage plate. The plug seemed to limit the vertical travel. Plug is missing now and I can't find it on the parts manual.
 
Running great just bugs me what that plug was for and how to set the linkage travel.
 
Thanks
     

That's a single cable operation , not two cables(one for choke, the other for RPMs), correct??
 
If so (likely), pushing the throttle fully forward activates the choke.  
Pull the throttle back some, the choke is OFF and the engine will be running at full throttle.
 
Pull the throttle back fully should get you to IDLE.  
 
To set the cable correctly, push the throttle forward fully- for full choke.
Now, at the engine, the small fastener (often an 8mm) loosen and push the cable 
so the choke is fully activated...
 
Soo, at the throttle, fully forward is full choke..  Done..
 
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https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/briggs-stratton/briggs-stratton-engine/200000-399999-series/33s800-to-33s899/33s877-0019-g1/controls-group 
 
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Yes it is a single cable. I will look at it closer and see if I can set it properly.
Thanks