When you say 3/4 do you mean 3/4 of a turn? Just tried with no luck. Here is a link to the video I just made of me working the choke. You can hear the engine inacordance with the choke. I couldn't figure out how to post the video on here so here is the video on YouTube.
https://youtu.be/EvcFTxcw10c. Not sure if this helps.
Sent from my SM-N950U using Tapatalk