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Emission Control System Information
Source of Emissions
The combustion process produces carbon monoxide, oxides of
nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of
nitrogen is very important because, under certain conditions, they
react to form photochemical smog when subjected to sunlight. Carbon
monoxide does not react in the same way, but it is toxic.
Honda utilizes lean carburetor settings and other systems to reduce
the emissions of carbon monoxide, oxides of nitrogen, and
hydrocarbons.
The U.S. and California Clean Air Acts
EPA and California regulations require all manufacturers to furnish
written instructions describing the operation and maintenance of
emission control systems.
The following instructions and procedures must be followed in order to
keep the emissions from your Honda engine within the emission
standards.
Tampering and Altering
Tampering with or altering the emission control system may increase
emissions beyond the legal limit. Among those acts that constitute
tampering are:
Removal or alteration of any part of the intake, fuel, or exhaust
systems.
Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design
parameters.
Problems That May Affect Emissions
If you are aware of any of the following symptoms, have your engine
inspected and repaired by your servicing dealer.
Hard starting or stalling after starting.
Rough idle.
Misfiring or backfiring under load.
Afterburning (backfiring).
Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your Honda engine were designed,
built, and certified to conform with EPA and California emission
regulations. We recommend the use of genuine Honda 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
An Air Index Information hang tag/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 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 (page 12) for
additional information.
The Air Index Information hang tag/label must remain on the engine
until it is sold. Remove the hang tag before operating the engine.
Specifications
Tuneup Specifications
Descriptive Term Applicable to Emissions Durability Period
Moderate 50 hours (0–65 cc)
125 hours (greater than 65 cc)
Intermediate 125 hours (0–65 cc)
250 hours (greater than 65 cc)
Extended 300 hours (0–65 cc)
500 hours (greater than 65 cc)
Length x Width x Height 13.3 x 14.5 x 13.5 in
(337 x 369 x 343 mm)
Dry weight 30.4 lb (13.8 kg)
Engine type 4-stroke, overhead cam, single cylinder
Displacement
[Bore x Stroke]
11.4 cu in (187 cm
3
)
[2.7 x 2.0 in (69 x 50 mm)]
Maximum output 6.0 bhp (4.4 kW, 6.0 PS) at 3,600 rpm
Maximum torque 8.9 ft-lb (12.1 N•m, 1.23 kg/m) at 2,500 rpm
Fuel consumption 0.51 lb/hph (313 g/kWh, 230 g/PSh)
Cooling system Forced air
Ignition system Transistorized magneto
PTO shaft rotation Counterclockwise
ITEM SPECIFICATION MAINTENANCE
Valve clearance (cold) IN: 0.15 ± 0.04 mm
EX: 0.20 ± 0.04 mm
See your authorized
Honda dealer
Other specifications No other adjustments needed.
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