I know you can take a FR691V at 19 HP and change the throttle rod that allows the throttle blades to open wider which increases air flow and rpm to make it a 23 HP.
Does anyone know what changes are necessary to go from the 23HP to 26HP? Is it the throttle rod stop needs to be ground off to allow the blades to open completely? Or a throttle rod change that can bring up the hp?
If anyone knows and has part numbers, I would appreciate any and all information on those changes.
