Professional Series™ (Single Cylinder)

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.

17.5 - 19.0

Gross Horsepower (HP)

500 - 540

Displacement (cc)

1.4

Oil Capacity (L)

2 Years

Warranty

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.

No Prime, No Choke

1-Step Start, just pull for power.

Specifications

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Model Number
31S9
Gross Horsepower (ft-lbs)*
17.5
Displacement (cc)
500
Cylinder Type
Cast Iron Sleeve
Engine Description
Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Length (in)
479
Width (in)
411
Height (in)
327
Weight (kg)
29.5
Bore (mm)
90.5
Stroke (mm)
77.8
Oil Capacity (L)
1.4

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.
See briggsandstratton.com for warranty details.

Model Number
33S8
Gross Horsepower (ft-lbs)*
19.0
Displacement (cc)
540
Cylinder Type
Cast Iron Sleeve
Engine Description
Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Length (in)
479
Width (in)
411
Height (in)
327
Weight (kg)
29.5
Bore (mm)
94.0
Stroke (mm)
77.8
Oil Capacity (L)
1.4

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.
See briggsandstratton.com for warranty details.