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

The 18HP Vertical Shaft Lawn Mower Engine is designed for those looking to revive their ride-on mowers with a powerful and reliable petrol motor.

• 550 cc 4-stroke OHV engine for efficient combustion and low fuel burn.
• Vertical shaft design ideal for mower decks and garden tractors.
• Electric start system with electronic ignition for quick, reliable starts.
• Cast-iron cylinder bore adds durability and long engine life.
• 1” (25.4 mm) output shaft with keyway for secure PTO connection.
• 8.7:1 compression ratio for balanced power and smooth operation.
• Mechanical governor maintains consistent engine speed under load.
• Transistorized magneto ignition for clean, spark-steady performance.
• Universal bolt pattern fits many Briggs and Stratton or Honda setups.
• Low-vibration balance reduces wear on mower frames and belts.

• 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 for secure attachment.
• Bolts for the solenoid valve are not required for installation.