Kawasaki FX921V 31HP 1-1/8″ Vertical Shaft Engine

The Kawasaki FX921V is a 31HP, 999cc commercial-grade V-Twin engine designed for the most demanding zero-turn mowers and industrial turf applications. As one of the most powerful engines in Kawasaki’s FX-Series, the FX921V delivers exceptional torque, smooth operation, and long-term durability under extreme workloads.

Built around a 90° OHV V-Twin configuration, this engine provides balanced power delivery and reduced vibration, making it ideal for professional operators running long hours in hot, dusty, and debris-heavy conditions. The pressurised lubrication system, combined with a high-efficiency oil cooler, ensures consistent internal protection even under continuous heavy load.

A multi-stage canister air filtration system, internally vented carburettor, and rotating metal debris screen protect the engine from dust and grass build-up while maintaining optimal cooling airflow. Cast-iron cylinder liners further enhance wear resistance, making the FX921V a trusted choice for contractors who demand maximum performance and longevity.

Key Features

• 31HP commercial-grade Kawasaki V-Twin engine

• Massive 999cc displacement for extreme torque output

• 1-1/8″ vertical shaft compatible with heavy-duty mower decks

• 90° OHV V-Twin design for smooth, balanced operation

• Pressurised lubrication system for continuous high-load protection

• High-efficiency oil cooler for temperature stability during long shifts

• Multi-stage canister air filter for dusty environments

• Internally vented carburettor to reduce fuel vapour issues

• Electronic spark ignition for reliable hot and cold starts

• Automatic compression release for easier cranking

• Cast-iron cylinder liners for long service life

• Rotating metal grass/debris screen to maintain cooling airflow

Technical Specifications

• Horsepower: 31 HP (23.1 kW) @ 3600 RPM

• Maximum Torque: 53.9 ft-lb (73.0 Nm) @ 2400 RPM

• Displacement: 999 cc

• Cylinders: 2

• Configuration: 90° V-Twin

• Engine Type: 4-stroke, vertical-shaft, air-cooled OHV

• Crankshaft: 1-1/8″ diameter

• Oil Capacity: 1.9 L (2.0 US qt)

• Dry Weight: 62.6 kg

Applications & Compatibility

• High-end commercial zero-turn mowers

• Professional landscaping and turf equipment

• Industrial and construction machinery

• Equipment requiring a 31HP Kawasaki FX-Series vertical shaft engine

Always confirm shaft length, wiring, and mounting requirements before installation.

Why Choose the Kawasaki FX921V?

• Exceptional torque for thick, wet, and overgrown grass

• Built for continuous commercial operation and extreme workloads

• Outstanding cooling and filtration for Australian conditions

• Reduced downtime and long service intervals

• Proven Kawasaki FX-Series reliability trusted by commercial fleets