Honda GX630 Owner's Manual page 13

Replacement Parts
The emission control systems on your Honda engine were
designed, built, and certified to conform with EPA, California
(models certified for sale in California), and Canadian emission
regulations. We recommend the use of Honda Genuine parts
whenever you have maintenance done. These original-design
replacement parts are manufactured to the same standards as the
original parts, so you can be confident of their performance. The
use of replacement parts that are not of the original design and
quality may impair the effectiveness of your emission control
system.
A manufacturer of an aftermarket part assumes the responsibility
that the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the
part will not result in a failure of the engine to comply with
emission regulations.
Maintenance
Follow the maintenance schedule on page 5. Remember that this
schedule is based on the assumption that your machine will be
used for its designed purpose. Sustained high-load or
high-temperature operation, or use in unusually wet or dusty
conditions, will require more frequent service.
Air Index
(Models certified for sale in California)
An Air Index Information label is applied to engines certified to an
emission durability time period in accordance with the requirements
of the California Air Resources Board.
The bar graph is intended to provide you, our customer, the ability
to compare the emissions performance of available engines. The
lower the Air Index, the less pollution.
The durability description is intended to provide you with
information relating to the engine's emission durability period.
The descriptive term indicates the useful life period for the engine's
emission control system. See your Emission Control System
Warranty for additional information.
Descriptive Term
Moderate
Intermediate
Extended
Specifications
GX630
Length×Width×
Height
Dry mass [weight]
Engine type 4-stroke, overhead valve, 2 cylinders (90° V-Twin)
Displacement
[Bore×Stroke]
Net power LPG
(in accordance with SAE J1349*)
Natural
gas
Max. Net torque LPG
(in accordance with SAE J1349*)
Natural
gas
Engine oil capacity Without oil filter replacement:
With oil filter replacement:
Cooling system
Ignition system
PTO shaft rotation
ENGLISH
Applicable to Emissions Durability Period
50 hours (0–80 cc, inclusive)
125 hours (greater than 80 cc)
125 hours (0–80 cc, inclusive)
250 hours (greater than 80 cc)
300 hours (0–80 cc, inclusive)
500 hours (greater than 80 cc)
1,000 hours (225 cc and greater)
426×410×438 mm
(16.8×16.1×17.2 in)
44.6 kg (98.3 lbs)
3
688.0 cm (41.97 cu-in)
[78.0×72.0 mm (3.07×2.83 in)]
14.4 kW (19.6 PS, 19.3 bhp)
at 3,600 rpm
12.7 kW (17.3 PS, 17.0 bhp)
at 3,600 rpm
45.0 N·m (4.59 kgf·m, 33.2 lbf·ft)
at 2,500 rpm
38.1 N·m (3.89 kgf·m, 28.1 lbf·ft)
at 2,500 rpm
1.5 L (1.6 US qt, 1.3 lmp qt)
1.7 L (1.8 US qt, 1.5 lmp qt)
Forced air
CDI type magneto ignition
Counterclockwise
13