Final answer:
When cleaning a carburetor without removal on a snow thrower, the primary consideration is the risk of damage.
Step-by-step explanation:
While it is possible to clean a carburetor on a snow thrower without removing it, the primary consideration when doing so should be the risk of damage. Cleaning a carburetor without removal requires using cleaning solvents and compressed air to remove dirt and debris from the carburetor's components. However, this process can be delicate and there is a risk of damaging sensitive parts if not done properly.