Bg75 fan assembly washers puzzle

[Slippery Pete]

I am reassembling the fan on a bg75 leaf blower and notice there are 2 washers involved. Does anyone know where they go? Maybe one on either side or both together on the outside? I'm struggling to find any parts diagrams. I wish I would have taken notes and maybe pictures during disassembly. Thanks.

 

[Slippery Pete]

They're one on each side as I just took apart a 72. FYI I just bought an 86 and like the extra power quietness and less vibration?
Thx,
Petie