Maybe, maybe not - depends on type of flails, I think hammer VS. side slicer quite a different power usage.
Ford 1310 has 19 hp engine and is very capable running 5 ft Ford 917L flail mower with the 96 x side slicer flails it was designed for.
This mower was designed as a light duty model, to be used with side slicers only and it works well as intended.
May 2021 - pretty tall stuff due to wet spring.
Obviously need to mow more often for sure, but the ground had been way too wet previously.
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Cheers