And it turns freely by hand, through 2-3 complete revolutions?

I hate saying this on an open forum, but can you plug it in, reach in with a pencil and flip a fan blade over, and see if it runs?

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.