Max. Output : 1.8KW(2.5HP) / 2.9KW(4HP) Full throttle operating Range : 5250- 5750rpm (2.5hp) / 4000-5000rpm(4HP) Stroke : 4 Cylinder : 1 Displacement: 72cc (2.5hp) / 112cc(4HP) Bore X Stroke : 54*31.5mm(2.5hp) / 59*41(4HP) Length X Width X Height: 623*345*1021mm(2.5hp) / 717*361*1029mm (4HP) Weight: 17kgs(2.5hp) / 22kgs ( 4HP ) Gear Ratio: 2.08(27/13) Gear Shift Position: F-N(2.5hp ) / F-N-R (4HP) Ignition System : TCI Cooling System : Water - Cooling Starting System : Manual Control System: Tiller Control Capacity Of Fuel Tank: 0.9L (2.5hp ) / 1.1L ( 4HP) Recommended Oil : Regular lead-free gasoline