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| Feature / Model |
GX22 |
GX31 |
| Engine Type |
Air-cooled 4-stroke OHV single cylinder |
Air-cooled 4-stroke OHV single cylinder |
| Bore x Stroke |
1.3 x 1.02 in. |
1.54 x 1.02 in. |
| Displacement |
22 cc |
31 cc |
| Compression Ratio |
8.0:1 |
8.0:1 |
| Maximum Power Output |
.074 kW (1hp) / 7,000 rpm |
1.1 kW (1.5hp) / 7,000 rpm |
| Maximum Torque |
1.09 Nm (0.8 ft-lbs.) / 4,500 rpm |
1.64 Nm (1.23 ft-lbs.) / 4,500 rpm |
| Carburetor |
Diaphragm-type (overflow return) |
Diaphragm-type (overflow return) |
| Ignition System |
Transistorized Magneto |
Transistorized Magneto |
| Sparkplugs |
NGK C5HSB / CR5HSB, ND U16FS-UB / U16FSR-UB |
NGK C5HSB / CR5HSB, ND U16FS-UB / U16FSR-UB |
| Starting System |
Recoil |
Recoil |
| Fuel Type |
Regular Gasoline |
Regular Gasoline |
| Fuel Tank Capacity |
0.48 qts. |
0.62 qts. |
| Fuel Consumption |
340g / kWh (0.55 lbs./hpH) |
340g / kWh (0.55 lbs./hpH) |
| Lubrication System |
Crankcase pressure driven |
Crankcase pressure driven |
| Oil Capacity |
.11 quart |
.11 quart |
| Air cleaner |
Semi-dry |
Semi-dry |
| Dimensions (L x W x H) |
8.27 x 9.88 x 9.80 in. |
8.27 x 9.88 x 9.84 in. |
| Dry Weight |
7.3 lbs. |
7.5 lbs. |
| PTO Shaft Rotation |
Counter Clockwise (viewed from PTO shaft side) |
Counter Clockwise (viewed from PTO shaft side) |
| Feature / Model |
GX22 |
GX31 |
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