Dave,
Only advantage I realize w/ my IH is better fuel economy. The cutting results appear just the same at reduced RPM
Confused how PTO engagement at high speed projects less shock to mower?
I am more concerned about Tractor PTO clutch wear, will continue to engage PTO at idle speed. Do NOT have "soft start" pto.
In heavy grass I do operate at 555, which is the designated Tractor speed for pto on tachometer. Why 555? Tractor British made, no clue.
Mower is Canadian built walco-douglas 90 inch finish mower.
EDIT
Edritchey, know that current ehgine technology is centered upon lower RPM's The Whole Eco Pto speed is based upon operating non-demanding implements at lower engine RPM speeds while maintaining default PTO Speed, My fuel consumprion is reduced by a gallon/hr when reducing RPM's. My next tractor will have 540E capability.