don't have one of those,
but some of the harbor freight things
i've bought have weak motors new.
you may have to loosen up any idler
that is present to get it to run. i have
a belt sander that is that way and that's
what i did. when you use those tools, you
have to be careful not to put too much of
a load on them. i have one of their drills
and if you load it too much it'll bog down
and you can smell the electric smell.
i don't think it's a storage problem, i think
it's just their cheap tools.
good luck with it