When your mower’s heart gives out, drop in the KingTech 18HP Vertical Shaft Engine and bring it back to life. This 550cc 4-stroke OHV petrol motor packs serious grunt with smooth, dependable power that gets the job done every time. Built for ride-on mowers, this motor slots in where most Briggs and Stratton or Honda mounts sit – no fuss, just fit and fire. Designed for Aussie yards and conditions, it’s got the torque to cut thick grass and the reliability to run season after season. If you want a straight-talking upgrade that just works, KingTech’s got your back.
Key Features
- 18 Horsepower output delivers strong, steady performance for ride-on mowers.
- 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.
Specifications
| 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 (1â€) 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 |
Installation Bolt Details
• Mounting interface includes3 through holes of ˜ 8.8 mm and 1 blind hole of ˜ 8.8 mm for secure attachment.
• Bolts for the solenoid valve are not required for installation.

For returns due to change of mind, a 20% restocking fee will be applied.