.png%3Fsfvrsn%3D840d33f6_2&w=1920&q=75)
.png%3Fsfvrsn%3D840d33f6_2&w=2048&q=80 "Professional Series (Single Cylinder)")
Model Number
31S7
31S8
31S9
33S7
33S8
HP (gross) **
15.5.0
16.5.0
17.5.0
18.5.0
19.0
Engine Displacement (cc)
500
500
500
540
540
Number of Cylinders
Single
Single
Single
Single
Single
Engine Configuration
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
OHV Engine
Yes
Yes
Yes
Yes
Yes
Length (in)
18.9
18.9
18.9
18.9
18.9
Width (in)
16.2
16.2
16.2
16.2
16.2
Height (in)
12.9
12.9
12.9
12.9
12.9
Weight (lbs)
77
77
77
77
77
Bore (in)
3.56
3.56
3.56
3.7
3.7
Stroke (in)
3.06
3.06
3.06
3.06
3.06
Engine Fuel
Gasoline
Gasoline
Gasoline
Gasoline
Gasoline
Fuel Tank Capacity (gal)
N/A
N/A
N/A
N/A
N/A
Lubrication System
Full Pressure Lubrication
Full Pressure Lubrication
Full Pressure Lubrication
Full Pressure Lubrication
Full Pressure Lubrication
Oil Capacity (oz)
48.0
48.0
48.0
48.0
48.0
Oil Filter
Premium
Premium
Premium
Premium
Premium
Starter
Electric Start
Electric Start
Electric Start
Air Filter
Dual Element Cartridge with Advanced Debris Management
Dual Element Cartridge with Advanced Debris Management
Dual Element Cartridge with Advanced Debris Management
Dual Element Cartridge with Advanced Debris Management
Dual Element Cartridge with Advanced Debris Management
Muffler
Optional
Optional
Optional
Optional
Optional
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