18HP Vertical Shaft Petrol Engine 550cc 4 Stroke OHV for Ride On Mowers

The 18HP Vertical Shaft Lawn Mower Engine is designed for those seeking reliable power for their ride-on mowers, perfect for tackling tough grass in Australian yards.

• 18 Horsepower output ensures strong, steady performance.
• Efficient 550 cc 4-stroke OHV engine promotes low fuel consumption.
• Vertical shaft design is suitable for mower decks and garden tractors.
• Electric start system allows for quick and dependable starts.
• Durable cast-iron cylinder bore extends engine life.
• 1” output shaft with keyway ensures secure PTO connection.
• 8.7:1 compression ratio balances power and smooth operation.
• Mechanical governor maintains consistent speed under load.
• Transistorized magneto ignition provides clean performance.
• Universal bolt pattern compatible with many setups.
• Low-vibration design reduces wear on mower components.

• Engine type: 4-stroke, single-cylinder OHV petrol engine
• Displacement: 550 cc
• Bore × Stroke: 94.5 mm × 78 mm
• Compression ratio: 8.7 : 1
• Rated output: 13.2 kW @ 3600 rpm (18 HP)
• Max torque: 39.5 Nm @ 2500 rpm
• Shaft type: Vertical, 25.4 mm (1”) keyway
• Rotation: Counter-clockwise (PTO view)
• Starting system: Electric start
• Ignition: Transistorized magneto
• Governor system: Centrifugal mechanical
• Oil capacity: 1.5 L
• Weight: 41 kg

• Mounting interface includes 3 through holes of Ø 8.8 mm and 1 blind hole of Ø 8.8 mm.
• Bolts for the solenoid valve are not required for installation.