Intek™ (Single Cylinder)

Discover a new standard in reliability. The powerful Intek™ Series riding mower engines deliver superior performance and durability.

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Product Details

Anti-Vibration System - AVS®

Provides a smoother ride and more comfort.

Intek Series™ Riding Mower Engine

More durable. More efficient. More powerful. Mows the lawn and lasts long.

ReadyStart® Engine Starting System

No prime, no choke, no worries. Just pull for power.

Advanced Debris Management System

Keeps the engine clean by deflecting and ejecting grass and debris for a longer engine life.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 10.5*
Model Number 21R7
Engine Displacement (cc) 344
Cylinder Cast Iron Sleeve
Bore (mm) 87.3
Stroke (mm) 57.5
Oil Capacity (L) 1.4
Dry Weight (kg) 26.8
Length (mm) 452
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 90 Days Commercial Limited†
Fuel Tank Capacity 2.6 (optional)

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 13.5*
Model Number 31R5
Engine Displacement (cc) 500
Cylinder Cast Iron Sleeve
Bore (mm) 90.5
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 14.5*
Model Number 31R6
Engine Displacement (cc) 500
Cylinder Cast Iron Sleeve
Bore (mm) 90.5
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 15.5*
Model Number 31R7
Engine Displacement (cc) 500
Cylinder Cast Iron Sleeve
Bore (mm) 90.5
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 16.5*
Model Number 31R8
Engine Displacement (cc) 500
Cylinder Cast Iron Sleeve
Bore (mm) 90.5
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 17.5*
Engine Displacement (cc) 500
Cylinder Cast Iron Sleeve
Bore (mm) 90.5
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 393
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Gross Horsepower 19*
Model Number 33R7
Engine Displacement (cc) 540
Cylinder Cast Iron Sleeve
Bore (mm) 94
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 411
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.

Engine Type Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Gross Horsepower 19*
Model Number 33R8
Engine Displacement (cc) 540
Cylinder Cast Iron Sleeve
Bore (mm) 94
Stroke (mm) 77.8
Oil Capacity (L) 1.4
Dry Weight (kg) 29.5
Length (mm) 479
Width (mm) 411
Height (mm) 327
Consumer Warranty 2 Year Domestic Limited†
Commercial Warranty 1 Year Commercial Limited†

*Power levels are stated gross horsepower at 3600rpm per SAE J1940 as rated by Briggs & Stratton.

†See briggsandstratton.com for warranty details.