Model Number
21R7
21R8
31R5
31R6
31R7
31R8
21R7
21R7
HP (gross) **
10.50.0
11.50.0
13.50.0
14.50.0
15.50.0
16.50.0
10.50.0
10.50.0
Engine Displacement (cc)
344
344
500
500
500
500
344
344
Number of Cylinders
Single
Single
Single
Single
Single
Single
Single
Single
Engine Configuration
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
Vertical Shaft
OHV Engine
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Length (in)
17.8
17.8
18.9
18.9
18.9
18.9
17.8
17.8
Width (in)
15.5
15.5
15.5
15.5
15.5
15.5
15.5
15.5
Height (in)
12.9
12.9
12.9
12.9
12.9
12.9
12.9
12.9
Weight (lbs)
66
66
77
77
77
77
66
66
Bore (in)
3.44
3.44
3.56
3.56
3.56
3.56
3.44
3.44
Stroke (in)
2.26
2.26
3.06
3.06
3.06
3.06
2.26
2.26
Engine Fuel
Gasoline
Gasoline
Gasoline
Gasoline
Gasoline
Gasoline
Gasoline
Gasoline
Fuel Tank Capacity (gal)
0.7 (optional)
0.7 (optional)
N/A
N/A
N/A
N/A
0.7 (optional)
0.7 (optional)
Lubrication System
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Dura-Lube Splash Lubrication
Oil Capacity (oz)
48.0
48.0
48.0
48.0
48.0
48.0
48.0
48.0
Oil Filter
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Starter
Electric Start, Recoil Optional
Electric Start, Recoil Optional
Electric start, recoil optional
Electric start, recoil optional
Electric start, recoil optional
Electric start, recoil optional
Electric start, recoil optional
Electric start, recoil optional
Air Filter
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Cartridge Air Cleaner with Advanced Debris Management
Muffler
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
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