New John Deere 47SB Snowblower - Noisy

[Dutch445]

But after all this messing around I do believe the noise in the video is the plastic impeller jumping back and forth on the shaft. There is some play the allowing it to move back and forth (front to back) on the shaft. It looks like I could maybe loosen the collar that holds the shear bolt and slide it back to take up this play and eliminate that noise. Is that accurate? Thank you.

that collar on the impeller drive can be loose,, causing that impeller assy
to slide forward, sometimes enough to make contact with the snowblower
housing. the design isn't great, they use set screws to try to hold that
to the shaft and sometimes they don't bite enough. I've seen different fixes,
remove the assy, make sure the holes for the set screws are tapped fully,
or sometimes we've used a 1' locking split collar in front of that drive collar
and that keeps the impeller from coming forward.
another idea we have had is to drill out that hub at the key so that a set
screw locks onto the key, which is the way i would have thought it
should have been from the beginning.
if you don't like the allen screws, you can remove them and use square
head set screws for a better bite with a wrench, just don't get any longer
than you need.

make sure the chain is well lubricated, and that the sprockets are not just
adjusted for slack, but in alignment also with a good straight edge.

or as mentioned, maybe have the dealer check it out, especially since you
did notice the loose hub for the impeller.