Honda
V-Twin
Engines
Welcome to the
Next Generation of Honda
V-Twin Technology
Like the rest of the models in Honda’s extensive
lineup of GX general purpose engines,
these newly redesigned Honda V-twins
offer the kind of high power, easy
usability, and all-around hardworking
toughness the world has come to expect
from Honda. Their 4-stroke OHV combustion ensures reliable, easy starting
and smooth, stable power output, not
to mention cleaner emissions and
reduced noise and vibration. Designed
for versatility, including PTO shaft variations and mounting flanges conforming to
all SAE standards, their user-friendly high
reliability, functionality, and flexibility make them
the perfect choice for a vast range of applications.
Reliable and Easy To Use
Improved Starting and Reliability
• Highly reliable shift-type electric starter
ensures easy starting even in extreme
cold down to -30°C.
• Transistorized magneto ignition equipped
with a 12V-20A AC generator provides
dependable battery charging capacity
even during idling.
• Optional recoil starter available for
GX/GXV610K1 and GX/GXV620K1.
• Centrifugal mechanical decompression
ensures smooth, easy starts.
• Automotive-style lubrication system
featuring a high-pressure trochoid pump
and cartridge-style air filter ensures
high durability.
• Optional Auto Throttle™ —Electronic
solenoid-activated system for quick
throttle response in generator applications.
Highly Efficient 90° V-Twin
OHV Format
• The 90° V-twin OHV format featuring an
advanced combustion chamber design
and superior intake and exhaust
efficiency combines
the ordinarily opposed
elements of good fuel
economy and high
power output at the
highest possible
levels. An advanced
breather design and
3-piece oil ring
improve oil circulation efficiency for
lower oil consumption. The result is
excellent reliability plus reduced
running and maintenance costs.
Stable Governor Performance
• Separate-shaft governor optimized by a
needle-bearing-supported output shaft
helps smooth out engine speed fluctuations caused by varying loads.
Large-Capacity Air Cleaner
• Compact, large-capacity, Honda
automotive-style air cleaner ensures
efficient intake of cooler, denser air to
suppress potential power degradation
caused by the intake of hot air.
• Generous 3,100cm2 cleaning element
surface area and low-positioned air
intake port help reduce aircleaner
dust build-up.
Low Noise
• Cam and oil
pump gears
made of lightweight, durable,
heat-resistant
resin minimize
gear-meshing
noise.
• Plastic resin fan
cover helps screen out engine noise.
• All-resin Scirocco cooling fan features
irregular-pitch blades to minimize
fan noise.
• Improved crankcase rigidity, extradurable crankshaft, and optimized cam
shape reduce mechanical noise and
contribute to quieter, smoother
continuous operation.
Low Vibration
• Honda-developed highstrength sintered aluminum
connecting rods reduce
weight in overlap areas to
minimize vibration caused by
the cylinder offset.
• Compact 90° V-twin configuration
contributes to overall compactness and
extremely low-vibration operation.
Clean Running
Clears Strict CARB and EPA
Emissions Regulations
• V-twin series Honda engines featuring
high-efficiency OHV combustion and a
compact semi-hemispherical combustion
chamber design already clear the CARB
emissions regulations that are currently
the strictest in the world, and will also
clear the even tougher EPA regulations
that will take effect in 2001.
EPA = U.S. Environmental Protection Agency
CARB = California Air Resources Board
Honda —
Power With a Clear Advantage.
GX Horizontal Shaft V-Twins
GX610/GX620 Dimensions (Q-type) (unit: mm)
PTO Shaft Dimensions
(unit: mm)
457
296.8
274.1
388
198
190
2-M8✕1.25 18 DEPTH
Q-type
0
- 0.13
50
28
229
74
127
V-type
133.5
165.1
45˚
4-7/16-14 UNC-2B
TAP DEPTH
(Q, P & V TYPES)
16
4-3/8-16 UNC-2B TAP DEPTH
(Q, P & V TYPES)
4-M10✕1.25 18 DEPTH (S TYPE)
86
2-1/4 TAPER
PER FOOT
25
16
63
+ 0.003
.9
196
22 0
(TAPER
GAUGE DIA.)
30˚
45˚ 45˚
45˚
+ 0.05
0
6.3
452
157.9
30˚
132.5
157.9
229
49.6
49.6
(025.4˚-0.025)
2-M8✕1.25 19 DEPTH
3/8-24UNF
2B TAP
6.5
68
5/16-24UNF
2B TAP
6.5
77.5
253
4-5/16-24 UNF-2B TAP DEPTH
4-M8✕1.25 18 DEPTH (S TYPE)
4- 9.45 +00.2 (S TYPE)
105
GX610
PERFORMANCE CURVES
(PS)
20
18
Maximum Power Output
GX620
(kW)
15
(PS)
20
18
13
16
10
Output
12
14
9
(Nm) (kg-m)
45
4.5
7
8
40
35
2,000
2,500
3,000
4.0
Torque
Maximum Torque
11
14
Output
GX610K1
13
16
11
Recommended Power Output
(kW)
15
12
10
9
(Nm) (kg-m)
45
4.5
7
8
40
35
3.5
3,600
Engine Speed (rpm)
2,000
2,500
3,000
4.0
Torque
90.5
3.5
3,600
Engine Speed (rpm)
GX620K1
Model
Engine Type
Bore x Stroke
Displacement
Compression Ratio
Maximum Power Output
Recommended Maximum Power Output
Maximum Torque
Ignition System
Starting System
ACG Output
Decompression
Aircleaner
Oil Capacity
Fuel Consumption
Dimensions (LxWxH)
Dry Weight
Specifications are subject to change without notice.
GX610K1
GX620K1
GX670
Air-cooled 4-stroke OHV 90° V-twin; Horizontal Shaft
3.0 x 2.6 in (77 x 66 mm)
3.0 x 2.8 in (77 x 72 mm)
37.5 cu in (614 cc)
40.9 cu in (670 cc)
8.3:1
18 HP/3,600 rpm (13.2 kW)
20 HP/3,600 rpm (14.9 kW)
24 HP/3,600 rpm (17.9 kW)
16.2 HP/3,600 rpm (12.1 kW)
17.9 HP/3,600 rpm (13.3 kW)
21.5 HP/3,600 rpm (16 kW)
31.7 lbf ft (43.1 Nm)/2,500 rpm 32.5 lbf ft (44.1 Nm)/2,500 rpm
37.5 lbf ft (50.8 Nm)/2,500 rpm
Transistorized magneto
Electric or Electric/Recoil
Electric
12V-3A or 12V-20A
12V-20A
Centrifugal
Heavy Duty Dual Element
1.9 U.S. Qts (1.8 liters) w/oil filter replacement
2.01 U.S. Qts (1.9 Liter) w/oil filter
0.51 lb/HPh (230 g/HPh, 313 g/kWh)
0.59 lb/HPh (269 g/HPh, 360 g/kWh)
15.3 x 18 x 17.8 in (388 x 457 x 452 mm)
16.2 x 18.5 x 18 in (412 x 471 x 457 mm)
92.6 lbs (42 kg)
94.8 lbs (43 kg)
GX Horizontal Shaft V-Twins
GX670 Dimensions (Q-type) (unit: mm)
PTO Shaft Dimensions
(unit: mm)
471
412
222
6.5
2-M8✕1.25 18 DEPTH
B-type
126
9.53
+ 0.05
0
92
43.5
111.2
T-type
45˚
45˚
0
0
16
4-3/8-16 UNC-2B TAP DEPTH
86
63
70
43.5
36
5.1
133.5
16
+ 0.05
0
25 - 0.13
6.3
28.575 - 0.025
7/16-20UNF2B TAP
.9
196
127
45˚ 45˚
457
229
30˚
157.9
157.9
30˚
132.5
229
49.6
49.6
0
31- 0.13
2-M8✕1.25 19 DEPTH
0
68
36.5- 0.025
274.1
6.5
5/8-18UNF2B TAP
296.8
16
90
190
4-5/16-24 UNF-2B TAP DEPTH
4-7/16-14 UNC-2B TAP DEPTH
90.5
105
GXV670
PERFORMANCE CURVES
(PS)
24
Maximum Power Output
22
Recommended Power Output
(kW)
18
16
20
14
16
14
12
(Nm) (kg-m)
50
5.0
10
12
45
8
10
GX670
40
2,000
2,500
3,000
4.5
Torque
Output
18
Maximum Torque
4.0
3,600
Engine Speed (rpm)
New Features Improve Power and Reliability for the GX670!
Oil Cooler
In addition to their highpressure automotivestyle lubrication system
and cartridge-type air
filter, the new V-twin
GX’s come equipped
with a forced-air oil cooler that constantly
maintains optimum oil temperature to ensure
consistently smooth, powerful performance
even during extended operation.
Twin-Barrel
Carburetor
In addition to a
diaphragm fuel pump
that automatically supplies exactly the right
amount of fuel, the carburetor itself features twin valves that reduce
air-intake resistance to ensure consistently
high power output and stable operation.
Vertical Shaft V-Twins
GXV610/GXV620Dimensions (Q-type) (unit: mm)
PTO Shaft Dimensions
457
(unit: mm)
296.8
274.1
6.5
388
6.5
68
198
190
2-M8✕1.25 18 DEPTH
Q-type
.9
196
45˚ 45˚
61
28
229
30˚
452
157.9
30˚
132.5
157.9
229
79
49.6
49.6
2-M8✕1.25 19 DEPTH
7/16-20UNF 2B TAP
0
25.4 - 0.025
127
0
21.82 - 0.13
45˚
45˚
4-7/16-14 UNC-2B
TAP DEPTH
(Q, P & V TYPES)
6.3
133.5
+ 0.05
0
165.1
16
4-3/8-16 UNC-2B TAP DEPTH
(Q, P & V TYPES)
4-M10✕1.25 18 DEPTH (S TYPE)
86
16
63
253
4-5/16-24 UNF-2B TAP DEPTH
4-M8✕1.25 18 DEPTH (S TYPE)
4- 9.45 +00.2 (S TYPE)
105
GX610K1
PERFORMANCE CURVES
(PS)
20
18
Maximum Power Output
GX620K1
(kW)
15
(PS)
20
18
13
16
10
Output
12
14
9
(Nm) (kg-m)
45
4.5
7
8
40
35
2,000
2,500
3,000
Engine Speed (rpm)
3,600
4.0
Torque
Maximum Torque
11
14
Output
GXV610K1
13
16
11
Recommended Power Output
(kW)
15
12
10
9
(Nm) (kg-m)
45
4.5
7
8
40
35
3.5
2,000
2,500
3,000
3,600
Engine Speed (rpm)
GXV620K1
Model
Engine Type
Bore x Stroke
Displacement
Compression Ratio
Maximum Power Output
Recommended Maximum Power Output
Maximum Torque
Ignition System
Starting System
ACG Output
Decompression
Aircleaner
Oil Capacity
Fuel Consumption
Dimensions (LxWxH)
Dry Weight
Specifications are subject to change without notice.
GXV610K1
GXV620K1
Air-cooled 4-stroke OHV 90° V-twin; Vertical Shaft
3.0 x 2.6 in (77 x 66 mm)
37.5 cu in (614 cc)
8.3:1
18 HP/3,600 rpm (13.4 kW)
20 HP/3,600 rpm (14.9 kW)
16.2 HP/3,600 rpm (12.1 kW)
17.9 HP/3,600 rpm (13.3 kW)
31.7 lbf ft (43.1 Nm)/2,500 rpm
32.5 lbf ft (44.1 Nm)/2,500 rpm
Transistorized magneto
Electric or Electric/Recoil
12V-3A or 12V-20A
Centrifugal
Heavy Duty Dual Element
2.3 U.S. Qts (2.2 liters) w/oil filter replacement
0.51 lb/HPh (230 g/HPh, 313 g/kWh)
18.1 x 18 x 17 in (459 x 457 x 431 mm)
94.8 lbs (43 kg)
4.0
3.5
Torque
90.5
Vertical Shaft V-Twins
GXV670 Dimensions (Q-type) (unit: mm)
PTO Shaft Dimensions
(unit: mm)
<Bottom View>
473
296.8
274.1
T-type
464
6.5
6.5
2-M8✕1.25 18 DEPTH
76.5
96.5
351.5
7/16-20UNF-2B TAP
0
28.575 - 0.025
161.5
0
25 - 0.13
45˚
97.5
45˚
P.
D.
25
4
133.5
6.3
+ 0.05
0
35˚
449
229
157.9
35˚
157.9
229
43.5
49.6
49.6
190
2-M8✕1.25 19 DEPTH
GX670
PERFORMANCE CURVES
(PS)
24
Maximum Power Output
22
Recommended Power Output
(kW)
18
16
20
14
16
14
12
(Nm) (kg-m)
50
5.0
10
12
45
8
10
GXV670
Model
Engine Type
Bore x Stroke
Displacement
Compression Ratio
Maximum Power Output
Recommended Maximum Power Output
Maximum Torque
Ignition System
Starting System
ACG Output
Decompression
Aircleaner
Oil Capacity
Fuel Consumption
Dimensions (LxWxH)
Dry Weight
Specifications are subject to change without notice.
40
2,000
2,500
3,000
Engine Speed (rpm)
GXV670
Air-cooled 4-stroke OHV 90° V-twin; Vertical Shaft
3.0 x 2.8 in (77 x 72 mm)
40.9 cu in (670 cc)
8.3:1
24 HP/3600 rpm (17.9 kW)
21.5 HP/3600 rpm (16 kW)
37.5 lbf ft (50.8 Nm)/2500 rpm
Transistorized magneto
Electric
12V-20A
Centrifugal
Heavy Duty Dual Element
2.6 U.S. Qts w/oil filter replacement (2.5 liters)
0.59 lb/HPh (269 p/HPh, 360 g/kWh)
18.3 x 18.6 x 17.7 in (464 x 473 x 449 mm)
99.2 lbs (55 kg)
3,600
4.5
4.0
Torque
Output
18
Maximum Torque
Powerful, Compact
OHC V-Twin Engines
Ideal for home lawn tractors
In the GXV530, Honda has combined the power
and durability of its 90° V-twin 2-cylinder
engines with a space-saving overhead cam
(OHC) design to create highly compact
engines offering low vibration, low
noise, cleaner exhaust, excellent
reliability, and 530cc worth of high
power output ideal for power-hungry
applications such as home lawn tractors.
Backed by Honda’s world-renowned
engine-building experience, the GXV530
offers a high-level fusion of superior
power, reliability and cost performance
guaranteed to convince the most
demanding users.
Powerful Performance
Extra-large 530cc displacement assures
big power output and easy-to-use flat
torque performance across the power band.
User-Friendly Low Vibration
A primary vibration-cancelling 90° V-twin
cylinder layout and specially developed
high-strength sintered-aluminum connecting rods that minimize cylinder offset and
eliminate excess weight
combine to reduce overall
vibration to some of the
lowest in the class.
Lower Exhaust
Emissions
Four-stroke combustion, air resistancereducing twin-barrel
carburetors, and extra
compact combustion
chambers with centerpositioned spark plugs
all combine to promote
more efficient, more complete fuel combustion providing low emission levels that
clear CARB standards and are even below
EPA 2006 levels.
EPA = U.S. Environmental Protection Agency
CARB = California Air Resources Board
Advanced Lubrication
Technology
The GXV530 features Honda’s latest
and most advanced lubrication system.
QuadraLube™ Plus delivers oil to critical
engine components through both pressure
and splash lubrication. First, governor
slinger paddles splash oil on the connecting rods, pistons, cylinders and upper
ball bearing. Second, two timing belts
carry oil to the cylinder heads lubricating
the valve area. Plus, oil is pressure-fed
to both connecting rod big ends and the
crankshaft lower bearing. Finally, the oil
pump forces lubrication through the
Honda automotive-type oil filter to ensure
a consistent supply of clean oil. This
advanced oil delivery system allows the
GXV530 to offer superior lubrication,
reduced engine weight, quiet operation
and a more compact design.
Pleasant Low-Noise Operation
Honda-developed built-in OHC timing
belts, lightweight resin cams, and an
extra-quiet turbo cooling fan reduce engine
noise to an absolute minimum, enhancing
the smoother operating sound already
inherent in the 2-cylinder V-twin layout.
Compact OHC Design
Cams positioned to the side of the valves
(instead of above) makes GXV530
considerably more compact than
conventional OHC models.
GXV530 Dimensions
(unit: mm)
ENG
MT H
O LE )
55
˚(
331
(
45 ˚
EN
GM
TH
OL
E)
PTO Shaft Dimensions
(unit: mm)
80
57
25.4
(EXH PIPE CTR)
Side View
79
4– 8.6
+0.2
0
28
5
+1
0
60
+1
0
114
54
.2
P.D
4
. 25
P.D
7/ 16-20 UNF 2B TAP
(ENG MT HOLE)
11.5
0
OIL FILTER
CARTRIDGE
( EN
GM
T HO
LE )
55 ˚ ( E
Bottom View
N
T
GM
HO
LE
)
+0.05
0
˚
19 (OIL FILTER MAINTENANCE SPACE)
6.31
45
25.4 -0.025
21.82
0
-0.13
47
80
25.4 (EXH PIPE CTR)
OHC V-Twin Engines
GXV530
PERFORMANCE CURVES
(PS)
18
Maximum Power Output
(kW)
13
16
11
12
10
Maximum Torque
9
7
(Nm)
8
5
6
2,000
2,500
3,000
3,600
(kg-m)
40
4.0
35
3.5
30
3.0
Torque
Recommended Power Output
Output
14
Engine Speed (rpm)
Model
Engine Type
Bore x Stroke
Displacement
Compression Ratio
Maximum Power Output
Maximum Torque
Ignition System
Aircleaner
Oil Capacity
Fuel Consumption
Dimensions (LxWxH)
Dry Weight
Features
Cylinder
Oil Filter
Fuel Pump
Control
Starter
Charge Coil
Regulator/Rectifier
Exhaust Pipe
Oil Drain Bolt
GXV530 (vertical shaft)
Air-cooled 4-stroke OHC 90˚ V-twin
3.03 x 2.24 in (77 x 57 mm)
32.3 cu in (530 cm3)
8:1
16 HP (11.8 kW - 16 PS)/3600 rpm
26.9 lbf ft (36.5 Nm - 3.72 kg-m)/2500 rpm
Transistorized magneto
Dual Element
1.38 qt with oil filter (1.3 liters)
313 g/kWh (230 g/HPh, 0.51 lb/HPh)
18 x 16.8 x 13 in (456 x 427 x 331 mm)
67.2 lbs (30.5 kg)
Cast Iron Sleeve
Standard
Optional
1-lever or 2-lever
Electric or Electric+Recoil
3A or 12A or 18A
3A or 12A or 18A
Optional
M20 x 1.5 or 3⁄8 -18NPTF*
*3⁄8 -18NPTF thread size is for temporary drain bolt provided assuming later installation of extension pipe.
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For optimum performance and safety we recommend you read the owner’s manual before operating your Honda Power Equipment.
©2002 American Honda Motor Co., Inc. C0132 Rev. 1. Specifications subject to change without notice.