To simplify your request why don’t you post the Model, Type, and Serial number of your Tecumseh engine and then look it up here on Tecumseh. For what it is worth I have serviced over 1000 Tecumseh Powered Snowblowers and none of them used a carb with a built in primer. They all have a primer remotely located on the flywheel housing attached to the carb by a hose. All carbs were the same except ones had a adjustable main needle valve on the bottom of the fuel bowl. All others are fixed jets.
Take a picture of your engine along with the Model, Type, and Serial number of your Tecumseh engine, text or email it to me, and I will look it up for you.
Robbie
AtRo Racing Products
203-641-8569
AtRoRacing@Gmail.com