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Is this what you are looking for?I believe on this model that the control lever (the one you hit with your thumb for on/ off/choke) is what controls the choke. The tab on the right side contacts a tab on the air filter pushing the choke closed (it is inside the air filter, some of the newer ones do have a separate rod though
O34 service manual
Wow I wasn;t sure the entire manual would fit into this forum. Regardless here you are Sir!