TAKING CARE OF UNEXPECTED PROBLEMS
Engine will not start
POSSIBLE CAUSE
Choke is OFF.
Ignition switch or engine stop
switch is OFF.
Engine oil level is low (oil alert
models)
Out of fuel.
Bad fuel; engine stored
without treating gasoline, or
refueled with bad gasoline.
Spark plug faulty, fouled, or
improperly gapped.
Spark plug wet with fuel
(flooded engine).
Fuel filter clogged, carburetor
malfunction, ignition
malfunction, valves stuck, etc.
Engine lacks power
POSSIBLE CAUSE
Air filter clogged.
Bad fuel; engine stored
without treating the gasoline,
of refueled with bad gasoline.
Fuel filter clogged, carburetor
malfunction, ignition
malfunction, valves stuck, etc.
TECHNICAL INFORMATION
SERIAL NUMBER AND TYPE LOCATION
See figures on
page
1.
Record the engine serial number and type in the space below. You will
need this information when ordering parts and when making technical
or warranty inquiries.
MODEL
SERIAL NUMBER
GC160 or 190
__ __ __ __ __– __ __ _ __ __ __ __ _ __
Date of purchase
RADIO FREQUENCY INTERFERENCE LABEL (CANADA)
This engine complies with Canadian radio frequency interference
regulations, ICES-002.
CORRECTION
Unless the engine is warm, move
the choke lever to the CHOKE
position.
• Move the throttle lever to the
SLOW or FAST position
• Move the ignition switch lever to
the ON position
• Move the engine stop switch to
the ON position
Fill with the recommended oil to
the proper level
(page
7).
Refuel
Drain the fuel tank and carburetor.
Refuel with fresh gasoline.
Adjust or replace the spark plug
(page
8).
Dry and reinstall the spark plug.
Start the engine with the choke in
the OFF position and the throttle
lever in the FAST position.
Take the engine to an authorized
Honda servicing dealer or refer to
the shop manual to replace or
repair faulty components as
necessary.
CORRECTION
Clean or replace the air filter
(page
7).
Drain the fuel tank and carburetor.
Refuel with fresh gasoline.
Take the engine to an authorized
Honda servicing dealer or refer to
the shop manual to replace or
repair faulty components as
necessary.
TYPE
Carburetor Modifications for High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be too
rich. Performance will decrease, and fuel consumption will increase. A
very rich mixture will also foul the spark plug and cause hard starting.
Operation at an altitude that differs from that at which this engine was
certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications
to the carburetor. If you always operate your engine at altitudes above
5,000 feet (1,500 meters), have your servicing dealer perform this
carburetor modification. This engine, when operated at high altitude
with the carburetor modifications for high altitude use, will meet each
emission standard throughout its useful life.
Even with carburetor modification, engine horsepower will decrease
about 3.5% for each 1,000-foot (300-meter) increase in altitude. The
effect of altitude on horsepower will be greater than this if no
carburetor modification is made.
When using auto throttle type engines in high altitude applications,
the ability to idle down to 2,500 rpm could be diminished. See your
servicing dealer for information on adjustments if your auto throttle
unit does not idle down with the load released or has trouble returning
to full rpm with the load applied.
NOTICE
When the carburetor has been modified for high altitude operation,
the air-fuel mixture will be too lean for low altitude use. Operation at
altitudes below 5,000 feet (1,500 meters) with a modified carburetor
may cause the engine to overheat and result in serious engine
damage. For use at low altitudes, have your servicing dealer return
the carburetor to original factory specifications.
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 appropriate air/fuel ratios and other emissions control
systems to reduce the emissions of carbon monoxide, oxides of
nitrogen, and hydrocarbons. Additionally, Honda fuel systems utilize
components and control technologies to reduce evaporative
emissions.
The U.S., California Clean Air Act, and Environment Canada
EPA, California, and Canadian 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
NOTICE
Tampering is a violation of Federal and California law.
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.
ENGLISH
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