| Horizontal | Vertical | |||||
| GX630 | GX660 | GX690 | GXV630 | GXV660 | GXV690 | |
| Engine Type | Air-cooled, 4-Stroke, OHV | Air-cooled, 4-Stroke, OHV | ||||
| Bore x Stroke | 3.1" x 2.8" (78 x 72 mm) | 3.1" x 2.8" (78 x 72 mm) | ||||
| Displacement | 42 cu in (688 cm3) | 42 cu in (688 cm3) | ||||
| Compression Ratio | 9.3 : 1 | 9.3 : 1 | ||||
| Net Horsepower* | 20.3 hp (15.1 kW) | 21.0 hp (15.7 kW) | 22.3 hp (16.6 kW) | 20.3 hp (15.1 kW) | 21.0 hp (15.7 kW) | 22.3 hp (16.6 kW) |
| Net Torque* | 35.2 lbs ft (47.7 Nm) | 35.2 lbs ft (47.7 Nm) | 35.6 lbs ft (48.3 Nm) | 35.2 lbs ft (47.7 Nm) | 35.2 lbs ft (47.7 Nm) | 35.6 lbs ft (48.3 Nm) |
| PTO Shaft Rotation | Counterclockwise (from PTO shaft side) | Counterclockwise (from PTO shaft side) | ||||
| Ignition System | Digital CDI with variable ignition timing | Digital CDI with variable ignition timing | ||||
| Starting System | Shift Type | Shift Type | ||||
| Carburetor | 2-barrel, fuel cut solenoid, inner vent | 2-barrel, fuel cut solenoid, inner vent | ||||
| Lubrication System | Full Pressure | Full Pressure | ||||
| Connecting Rod | Forged Steel | Forged Steel | ||||
| Governor System | Mechanical | Mechanical | ||||
| Air Cleaner | Dual Element Type/Cylindrical | Dual Element Type/Panel | ||||
| Exhaust Emissions | Certified for use in all 50 states | Certified for use in all 50 states | ||||
| Evaporative Emissions | Low permeation hose and purge joint provided | Low permeation hose and purge joint provided | ||||
| Oil Capacity | 2.0 US qt (1.9 L) | 2.3 US qt (2.2 L) | ||||
| Oil Filter | Automotive Spin-On Style | Automotive Spin-On Style | ||||
| Dimensions (L x W x H) | 15.9" (405 mm) x 16.1" (410 mm) x 17.2" (438 mm) | 17.4" (443 mm) x 16.6" (421 mm) x 17.6" (447 mm) | ||||
| Dry Weight | 98 lbs (44.4 kg) | 101 lbs (45.7 kg) | ||||
| * The power rating of the engine indicated in this document is the net power output tested on a production engine (net power) and at 2,500 rpm (Max net torque). Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance, and other variables. | ||||||