i have a Hustler Raptor Flip Up 54" as well. Had it since 2016 brand new and very happy with it. I live on a little over 1 acre.
Good Luck with selling yours!
I did a quick search on Grasshopper mowers, don't exactly know which model you are going to get but after reading and watching a video...
Glad you got it working and good job on researching and getting the correct part (number) for it!
How exactly did you find out that the Hustler manuals part number was the incorrect part?
Can you list both the Hustler manuals part number as well as the actual correct part number?