It only keeps running with the choke on

Add when you first noticed it and whether the machine had been running normally beforehand. If this was its first use after storage, include that and the fuel history you know. The person looking at it can then relate the behavior to the right model and circumstances.

That description doesn’t prove the carburetor needs replacing. Choosing a component now could commit you to work before anyone has established the cause. Ask for an appointment that includes diagnosis.

Don’t keep changing the controls or repeating starts to prepare a more detailed message. Follow the operating and safety instructions for your machine.

A readable photo of the model label can help the repair business tell you whether they take on that machine. If you can’t reach it safely, explain what you do know and leave the missing details for them to ask about.