FLAIL Mower ID

/ FLAIL Mower ID #41  
I see what you mean by the slotted holes. I still have the factory assembly instructions for the F, and I read through them. The main frame was shipped separately from the deck unit, and no mention is specifically made as to a purpose for the slotted holes except for ease of alignment when assembling.
The pulley is a mystery...can't explain that one. There is an optional speed-up kit listed, using either an 8" or 7.25" cuttershaft pulley.
Maybe your mower was the last off the assembly line on a Friday and someone was in a rush to head home?
 
 

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