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Honda Engine Section

20.0 Horsepower Horizontal Shaft Application

Not just power, reliable power!! The V-Twins, like all Honda engines, are designed to be durable and reliable.  Honda's proven full-pressure lubrication system ensures a consistent flow of oil to every bearing surface including the rocker arms. This allows engine operation even under the toughest conditions, as well engine components are lubricated consistently. 


 
 

H.P.
Code
Model
Type
Weight
Sale Price
20.0
624500
GX620
QDF
92-96
Check Price
20.0
624600
GX620
QXA
92-96
Check Price

20.0

644280

GX620

QAF

92-96

Check Price

20.0
553300
GX620
QAF1
92-96
Check Price
20.0
634190
GX620
QYA
92-96
Check Price
20.0
624700
GX620
QYF
92-96
Check Price
20.0
553100
GX620
QAB
92-96
Check Price
20.0
-
GX620
QZB2
92-96
Check Price

20.0

644180

GX620

QZB3

92-96

Check Price

Prices subject to change.  Call to verify price and availability.


  Variation Number Locations 
 

Standard Features:
Optional Features:
  • V-Twin Overhead Valve Design 
  • 12 Volt Electric Starter 
  • Fuel Pump 
  • Carburetor with a Fuel Cut Solenoid 
  • Meets Carb Standards 
  • Automobile Type Oil Filter 
  • Full Pressure Lubrication 
  • 3850 RPM Top Speed No Load 
  • D.E. Air Cleaner 
  • CARB & EPA Compliant 
  • Recoil Start 
  • High Mount Muffler Kit, With Left & Right Exhaust Available 
  • Side Mount Muffler Kit 
  • Oil Filter Extension for Side Mount Muffler Kit 
  • Spark Arrestors, Muffler Deflectors 
  • Flywheel Side P.T.O. 
  • Remote Oil Filter Kit 
  • Rotating Screen Grid 

GX620 20.0 H.P. Specifications:

Spec
Crankshaft
Oil Alert
Charging
Starting
Switch Box
Throttle
Note
QAB 
Q-TYPE 2.91" x 1"
12v-20a 
Electric 
No 
Remote 

QAF

Q-TYPE 2.91" x 1"

-

12v-20a

Electric

No

Remote

-

QAF1 
Q-TYPE 2.91" x 1"
Warning 
12v-20a 
Electric 
Yes 
Manual 
QDF 
Q-TYPE 2.91" x 1"
12v-20a 
Electric 
No 
Manual 
QXA 
Q-TYPE 2.91" x 1"
Shutdown 
12v-3a 
Electric 
Yes 
Remote 
QYA 
Q-TYPE 2.91" x 1"
Shutdown 
12v-3a 
Electric 
Yes 
Remote 
QYF 
Q-TYPE 2.91" x 1"
Warning 
12v-20a 
Electric 
No 
Remote 
QZB2 
Q-TYPE 2.91" x 1"
Shutdown 
12v-20a 
Electric & Recoil 
Yes 
Manual 
3

QZB3

Q-TYPE 2.91" x 1"

Shutdown 

12v-20a

Electric & Recoil 

Yes 

Manual 

3

Email us about other engine variations and details not listed.
Some models are factory order, other models can be modified to meet your individual needs.
Muffler Not Included. Click Here For Muffler Options: Kit $120.00


 

  • NOTE 1: Fan Cover To Accept Auxillary PTO. 
  • NOTE 2: Provisions for Recoil, (Fan Cover).
  • NOTE 3: See image below showing showing oil filter adapters

Oil filter adapters


 
 

Click Here For Engine Dimensions
GX610 & GX620 (18.0 & 20.0 h.p.)

Click Here For Owners Manual 
& Wiring Diagrams
 

Back to main Honda Section

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Basic Specs for the 
GX610-670 Models.
Check Out These Other
Great Honda Features:
Model
GX610 K1
GX620 K1
GX670
Engine Type
Air-cooled 4-stroke OHV 90' V-twin Horizontal Shaft
Bore x Stroke
3.0 x 2.6 in (77 x 66 mm)
3.0 x 2.8 in (77 x 72 mm)
Displacement
37.5 cu in (614 cc)
40.9 cu in (670 cc)
Compression Ratio
8.3:1
Maximum  Output
18 hp/3600 rpm (13.2 kW)
20hp/3600rpm (14.9 kW)
24 hp/3600rpm (17.9 kW)
Recommended Output
16.2 hp/3600rpm (12.1 kW)
17.9 hp/3600rpm (13.3 kW)
21.5 hp/3600rpm (17.9 kW)
Maximum Torque
31.7 lbf ft (43.1 Nm)/2500 rpm
32.5 lbf ft (44.1 Nm)/2500 rpm
37.5 lbf ft (50.8 Nm)/ 2500 rpm
Ignition System
Transistorized Magneto
Starting System
(Electric only) or (Electric & Recoil)
Electric
ACG Output
(12v-3a) or (12v-20a)
12volt-20amp
Decompression
Centrifugal
Air Cleaner
Heavy Duty Dual Element
Oil Capacity
1.9 U.S. Qrts. (1.8 liters) w/filter change
2.01 Qrts. (1.9 liters) w/filter 
Fuel Consumption
0.51 lb/HPh (230 g/HPh, 313 g/kWh)
0.59 lb/HPh (269,360)
Dimensions LxWxH
15.3 x 18 x 17.8 inches
16.2 x 18.5 x 18 inches
Dry Weight
92.6 lbs (42 kg)
94.8 lbs (43 kg)
Low Vibration!!
Honda-developed high strength sintered aluminum connecting rods reduce wight in overlap areas to minimize vibration caused by the cylinder offset. 

Honda Co. reserves the right to change product specifications, designs,
and standard equipment without notice and without incurring obligation.

This Honda engine information is thought to be completely accurate, but we are not responsible for any mistakes or inaccuracies. We provide this information as a courtesy to help you in deciding which engine is best for your application. Call us if you need more details or if you do not see the engine you need listed.

We will need your engine Model, Type, Code or Spec numbers to process your requests.
Click here if you can't identify your engine model type or code number!

All of our engines are new with factory warranty. (Not seconds like many other suppliers) If we do not stock the engine you need and it is still available, we can special order it and have it shipped direct to you from the factory, we have thousands of engines and short blocks available.

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