Professional Series™ (Single Cylinder)
World-class performance – time after time. With commercial-grade power, easy starting and quiet operation, the Professional Series riding mower engine delivers great results for your toughest jobs. And it keeps delivering, because this mower engine is built to last with our exclusive Advanced Debris Management System, chrome-plated exhaust valves and other durable features.Gross Torque (Nm) @ 3060 rpm
17.5 - 19.0
Displacement (cc)
500- 540
Oil Capacity (L)
1.4
Fuel Type
Gas
Features
Professional Series™ Rider Mower Engines
Single cylinder and V-twin engines offer the best of both worlds: world-class endurance and power.
Advanced Debris Management System
Keeps the engine clean by deflecting and ejecting grass and debris for a longer engine life.
Anti-Vibration System - AVS®
Provides a smoother ride and more comfort.
ReadyStart® Engine Starting System
No prime, no choke, no worries. Just pull for power.
Specifications
Selected Models:
| 31S9 | 33S8 | |
| Gross Torque (Nm) | 17.5 | 19 |
| Engine Displacement (cc) | 500 | 540 |
| Cylinders | Cast Iron Sleeve | Cast Iron Sleeve |
| Engine Configuration | Single cylinder, 4-stroke, air-cooled, OHV (Overhead Valve) | Single cylinder, 4-stroke, air-cooled, OHV (Overhead Valve) |
| Length (mm) | 479 | 479 |
| Width (mm) | 411 | 411 |
| Height (mm) | 327 | 327 |
| Weight (kg) | 29.5 | 29.5 |
| Bore (mm) | 90.5 | 94.0 |
| Stroke (mm) | 77.80 | 77.80 |
| Oil Capcity (L) | 1.40 | 1.40 |
| Limited Commercial Warranty | 1-Year | 1-Year |
| Limited Consumer Warranty | 2-Years | 2-Years |