I'm doing my annual snowblower maintenance this weekend... aside from the
usual oil change, spark plug, shear pins, etc... is there anything else I
should be doing?

It's a ~25 yr old Arien's dual stage snow blower that I bought used a few
years ago... 5 foward, 1 reverse gearbox, 5.5 Tecumseh Snow-King engine,
etc.

It runs like a champ - but I'm wondering if there are other areas I should
be giving attention to?

Thanks!