18HP Vertical Shaft Lawn Mower Engine 550cc 4-Stroke

The KingTech 18HP Vertical Shaft Engine is a 550cc 4-stroke OHV petrol motor designed as a direct replacement for ride-on mower engines. It delivers 13.2 kW (18 horsepower) at 3600 rpm with 39.5 Nm of torque, providing consistent power for cutting thick grass and heavy workloads.

Built with a cast-iron cylinder bore for durability, this engine features electric start with transistorized magneto ignition for reliable cold starts every time. The mechanical centrifugal governor maintains steady speed under load, while low-vibration engineering reduces wear on mower frames and drive belts.

The vertical 25mm keyway shaft fits standard ride-on mower decks and garden tractor mounting points compatible with Briggs and Stratton or Honda configurations. Installation is straightforward with a universal bolt pattern (three through holes and one blind hole of 8.8 mm diameter). The engine runs on standard petrol, holds 1.5 litres of oil, and weighs 41 kg.

Engineered for Australian conditions, this engine is designed to run season after season with minimal maintenance. Check your existing engine’s mounting interface and shaft specifications before ordering to ensure compatibility.

Order now and confirm your mower’s bolt pattern matches the 8.8 mm mounting holes.