Honda GX630RH-QAF1 Small Gas Engine Electric Start

With 1" Diameter, 1/4" Keyway Shaft

*** The Honda GX630RH-QAF has 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 horizontal shaft options:

98cc GX100T-QA2 Recoil Start

118cc GX120UT2-HX2 Recoil Start

118cc GX120UT3-QX2 Recoil Start

160cc 4GC160LA-QHA Recoil Start (Replaces GC160LA-QHG, GC160LAQHG)

163cc GX160UT2-QX2 Recoil Start

163cc GX160-HX2 Recoil Start

196cc GX200UT2-QXE2 Electric Start

196cc GX200UT2-QX2 Recoil Start

270cc GX270UT2-HA2 Recoil Start

270cc GX270UT2-QAE2 Electric Start (Replaced by GX270UT2X-QA2)

270cc GX270UT2-QA2 Recoil Start (Replaced by GX270UT2X-QA2)

389cc GX390UT2-QA2 Recoil Start

389cc GX390UT2-QAE2 Electric Start (Replaced by GX390UT2X-QAE2)

389cc OHV GX390UT2-QC9 Recoil Start

389cc GX390UT2X-HA2 Recoil Start

389cc GX390UT2-QNE2 Electric Start (Replaced by GX390UT2X-QNE2)

688cc GX630RH-QXA Electric Start

688cc GX630RH-QAF Electric Start

688cc GX630RH-QAF1 Electric Start

688cc GX630RH-QZB2 Electric Start

688cc GX630RH-QZB3 Electric Start

688cc GX630RH-TXF2 Electric Start

688cc GX690RH-TAF1 Electric Start

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