Possible cause:
The scraper is worn.
The scraper (17) is located at the base of the snow thrower underneath the rotor housing.
1.
Detach the worn scraper from the snow thrower by removing the 3 screws that hold it in place.
2.
Install the new scraper and fasten it securely to the snow thrower with 3 screws.
To order a new scraper, please contact customer support.