Honda GX630RH QAF1 Small Gas Engine Electric Start
20.8HP With 1" Diameter, 1/4" Keyway Horizontal Shaft
IN STOCK NOW!*** The Honda GX630RH-QAF is also in stock. It's the same as the GX630RH-QAF1, but does not include a control box. Click here.
* Needs ignition switch and harness if replacing old engine.
These premium residential motors are fuel efficient, easy starting and smooth performance. Perfect for tractor repower, generators, pressure washers, and various industrial and commercial uses. This convenient, heavy duty and reliable 4 stroke OHV twin cylinder engine does the job for many applications. Also, offering a 3-year limited warranty on these motors. Your order ships quickly with expert turnaround time in our fully stocked warehouse. Packaged with care, Carroll Stream Motor Company provides free shipping.
This Honda engine is a 4 Stroke OHV twin cylinder, which is a 78 X 72 stroke. It is a 688cc, 20.8 HP and 3600 RPM.
This Honda small motor is built with quality components and is ready to outlast the competition. Purchase now to take advantage of our free shipping and quick turnaround time. Or, call if you have questions! 888-208-2088, 248-628-4638.
Browse all of our Honda engine options:
GX690
GX630
- Honda GX630RH-QAF1 20.8HP Electric Start
- Honda GX630RH-QXA 20.8HP Electric Start
- Honda GX630RH-QZB3 20.8HP Electric Start
GX390
- Honda GX390UT2X-QNR2 11.7HP Electric Start
- Honda GX390UT2X-QNE2 11.7HP Electric Start
- Honda GX390UT2-QAE2 11.7HP Electric Start
- Honda GX390UT2-QA2 11.7HP Recoil Start
- Honda GX390UT2-HA2 11.7HP Gear Reduction
- Honda GX390UT2-QC9 11.7HP With Air Cleaner
- Honda GXV390T1-DETA 10.2HP Electric Start
- Honda GXV390UT1-DABG 10.2HP Recoil Start
GX270
- Honda GX270UT2-QAE2 8.5HP Electric Start
- Honda GX270UT2-HA2 8.5HP Recoil Start
- Honda GX270UT2-QA2 8.5HP Recoil Start
GX200
GX160
GX120
GX100
| Specifications | |
|---|---|
| Make | Honda |
| Model | GX630RH-QAF1 |
| Type | Small Engine |
| Fuel | Gas Unleaded 86 Octane or Higher |
| Engine Type | 4 Stroke OHV Twin Cylinder |
| Bore/Stroke | 78 X 72 |
| Displacement | 688cc |
| Compression Ratio | 9.3:1 |
| Max Power | 20.8 HP @ 3600 RPM |
| Max Torque | 35.6 ft. lbs. @ 2500 RPM |
| Ignition Type | Digital CDI with Variable Timing |
| Dimensions (L x W x H) | 16 x 16.25 x 17.25 in. |
| Starting Type | Electric Start |
| Charging System | 17 Amp |
| Oil Capacity | 2.1 Qts |
| Dry Engine Weight | 97 lbs. |
| Shaft Type | Keyed - Straight |
| Shaft Diameter | 1" Diameter, 1/4" Keyway |
| Shaft Length | 2-7/8" |
| Shaft I.D. Thread Size | 3/8"-24 Drilled and Tapped |
| Bolt Pattern | 4 Bolt |
| Oil System | Pressure lubrication, Oil Alert |
| Reduction Type | None |
| Engine Cooling Type | Forced Air Cooling |
| PTO shaft Rotation | Counterclockwise (from PTO shaft side) |
| Governor System | Centrifugal Mass Type |
| Air cleaner | Dual Element |
| Features | |
| 3-Year Limited Warranty | |
| Remote Throttle and Choke | |
| Two barrel inner-vent carburetor for more precise fuel metering | |
| Cast Iron Sleeve | |
| Smooth Performance | |
| Easy to Use and Maintain | |
| Simple throttle control | |
| Easy, convenient, heavy duty control box | |
| Easily accessible spark plug | |
| Easy Starting | |
| Hemispherical combustion chamber delivers rapid combustion | |
| Automatic mechanical de-compression system | |
| Emissions Compliant | |
| Lower emissions, same power output! | |
| CARB and EPA certified | |
| No catalyst necessary | |
| Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency | |
| OHV design for increased efficiency and optimal power transfer | |
| High compression ratio for better fuel efficiency | |
| Precision engineered components result in lower vibration | |
| Ball bearing supported crankshaft for greater stability | |
| Exceptionally Quiet | |
| Carburetor Butterfly | |
| Pressure fed crankshaft bearings | |
| Reduced mechanical noise due to light weight, noise-reducing materials | |
| Forged steel crankshaft and rigid crankcase | |
| Helical cut gears | |
| Sophisticated air intake system | |
| Proven Reliability | |
| New carburetor chamber coating and carburetor filter help to protect against fuel impurities | |
| Dual element air cleaner | |
| Fuel Valve | |
| Cross Reference Guide | |
| Kohler: CH640 | |
| Briggs & Stratton: 386447 | |
| Accessories | |
| User Manual | |
Use to Replace Model Numbers:
GX620K1-QAF1, GX620-QAF1
Please call for questions about what engines this replaces. (888-208-2088, 248-628-4638)
Any cross-reference is provided as a courtesy. You will be responsible for making sure the part number we are providing will fit your application. If you are unsure, please contact us before purchasing for help. Please have your model and serial number available.
